Self-study
Economist: Support A country's rapid emergence from an economic recession requires substantial new investment in that country's economy. █████ ████████ ██████████ ██ ███ ████████ ████████ ██ █████ ███████ ██ █ ████████████ ███ ███ ███ ███████████ █████████ ████ ███ ██████████ █████ ██████ ████████████ █████ ██████ ██████ ███████ ████ ██ ████████ ██████████
Summary
Countries that prioritize collective goals over individual goals can’t emerge quickly from recession. Why? Because quick emergence requires substantial investment in the economy, and that investment requires people’s confidence in economic policies. 
Missing Connection
The economist has provided a conditional chain that addresses one element of the conclusion (quick emergence), but the other element (prioritizes collective goals) is untethered. We need to conditionally tie this latter, unaddressed element to the premises in a way that excludes it from quick emergence.
There are a few ways to do this but, on the LSAT, they will usually ask you to create the longest conditional chain possible. So, we are looking for:
prioritizing collective goals → people do not have confidence.
15.
Which one of the following, ██ ████████ ███████ ███ ███████████ ██████████ ██ ██ ████████ ██████
a
No new investment ██████ ██ ███ ███████ ████ ████ ███ ██████ ███████ ████ ██ ████████ ██████████
We can’t trigger the sufficient condition of (A), “any country that does not emerge...” because it’s the thing we’re trying to prove.
The contrapositive of (B) would support a conclusion about countries that do emerge quickly from recession, but that’s not what we need to conclude.
b
Recessions in countries ████ ███ ██████████ █████ ██████ ████████████ █████ ████ ███ ██ ██████ ███ █████████ ████████ ███████ ███ █████ ████████████ █████████
(B) is an attempt to weaken the argument. (B) tells us that the type of country specified in the conclusion (puts collective goals over individual goals) usually does not fail one of the necessary conditions that leads to quickly emerging from a recession.
c
If the people ██ █ ███████ ████ ████ ████████████ █████ █████ ███ ███████ ██ ████ ███ ███████████ ██ █████ █████████ ████████ █████ ███████ ████ ██████ ███████ ████ ██ ████████ ██████████
(C) supports that a country will emerge quickly from recession, or, by contrapositive, that a certain kind of country isn’t willing to make new investments in the economy. We are trying to conclude that a certain kind of country (different than the kind specified in (C)) will not quickly emerge from recession.
d
People in countries ████ ███ ██████████ █████ ██████ ████████████ █████ ████ ██████████ ██ ███ ████████ ████████ ██ █████ ██████████
This matches our prediction and allows the conclusion to be validly drawn. If (D) is true, we can connect putting collective goals before individual goals to not having confidence in policies, which leads to a failure of investment, and that leads to not being able to quickly recover from recession.
e
A country's economic ████████ ███ ███ ████ ███████████ ██████ ███████████ ███████ ████ █████████ ███████ ████ ██████████ █ ██████████
We are not discussing the likelihood of a country experiencing a recession. We are discussing whether a country can emerge quickly from a recession.
Also, if we fix the aforementioned issue, whether economic policies are the most significant factor or not doesn’t affect the argument.