Did anyone else not know what "the parties were separated by less than 1 percent of the vote" meant?

I don't understand how he says A is merely presenting a correlation that can be explained by any other hypothesis, but doesn't say this about answer choice E, the correct answer. Couldn't you argue that the children from small families who entered day care before age one were less likely to develop allergies than children from small families who entered day care later for reasons other than being exposed to germs at the daycare?

How come there is a predicate object for question 3, which is "billboards are the basis of our business," yet question 1 and question 2 don't have a predicate object? The sentence without the modifiers for question 1 is "antibiotics fail" and for question 2 it's "Alfred Wegener developed," so I thought for question 3 it would be "Mary Simms declared."

I'm confused as to why "during his presidency" modifies "expanded" instead of "Thomas Jefferson."

I've seen a couple of posts saying some assumed the phrase "medical treatments or hospitalization" was connected to treating Disease A, instead of being the cause of Disease A, which is what I thought. How could I practice to prevent myself from misinterpreting question stems like this in the future?

How is C incorrect because there's no "example showing that there is a causal relationship between political structures and environmental conditions," yet E is correct because establishes the "existence of one kind of causal relationship?" Are those not the same thing???

Does not knowing how to do logic games put you at a disadvantage for questions like this? I feel like I'm lacking a foundation in logical reasoning partially because I never learned games.