Self-study
For years, a rare variety of camel was endangered because much of its habitat was used as a weapons testing range. █████ ███ ███████ █████ ███████ ████████ ███ ██████████ ██ █████ ██████ █████ ███████ ████ ████ ████████
"Surprising" Phenomenon
Why did the population of camels fall more quickly after a weapons testing range in its habitat was closed, even though the presence of the range endangered the camels?
Objective
The correct answer should suggest a potential difference between conditions after the range was closed and before it was closed, and this difference would lead to a greater threat to camels after the range was closed.
2.
Which one of the following, ██ █████ ████ █████ ██ ███████ ███ █████████ ████ ██ ██████████ █████
a
The weapons tests ███ ████ ████████ ████████ ███ ██ ███ ███████ ██████
This suggests that the threat of wildlife poaching (which would tend to kill camels) was greater after the range was closed. This increased threat could have outweighed whatever benefits the camels saw from a reduction in weapons testing at the range.
b
Weapons testing in ███ █████ ███ ████ ████ ██ ███ ██████ ██ ███ █████ █████ ██ ███ ███████ ████ ██ █████ ██████
Even if the range was less harmful later, we’d still expect the closing of the range to completely remove any harm from weapons testing. So, we still wouldn’t expect the camel population to decrease more quickly after the closing.
c
Because of unexploded ██████ ███ ████ ██████ ███ ███████ █████ ███ █████ ████████ █████████ █████ ███ █████ ██████ █████
We want to explain why the camel population began to fall more quickly after closing. We’re not just trying to explain why the benefits to the camels weren’t as great as anticipated. This doesn’t tell me why things got worse for the camels after closing.
d
The camels had ██ ████████ ███ █████████ █████████ ██ ███████ ██████ ███ ████ ███ ███████ █████ ███ ██ ██████████
This doesn’t suggest any difference between before and after the closing. Even if you read this as suggesting camels didn’t face as many disease outbreaks after the closing, that would make it more difficult to explain the faster drop in camel population after closing.
e
The weapons tests ████ ████ ███████ ██ ███ ██████ ██ █████ ████ ████ ███ ███████
This doesn’t suggest any difference between before and after closing. We’d still expect overall harm to camels to go down after closing.