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Can someone please explain this one to me?

PT58, LR1, #13

I thought the answer was A...

Thanks!

Hi Legalite,
13 is a main point question, which basically match the argument's conclusion. Answer choice A (which essentially restates the first sentence), is not the main point. The main point, or the conclusion, is found in the second sentence, where it talks about constantly broadening one's abilities. Also, the second sentence contains the word "enable" which is basically the same as "sufficient." So constantly broadening....is sufficient to inspire curiosity.
That is answer choice B in a nutshell, since it basically restates the second sentence in a slightly different format using "if...then" Also, the third sentence is just a premise, so it doesn't really factor into this answer choice.
Hope that wasn't too confusing haha.