Professor Robinson: A large meteorite impact crater in a certain region was thought to be the clue to explaining t...

on January 29, 2021

Why A

I feel like A makes sense as something that would be necessary for this argument since if this crater was even considered possible to be the extinction crater, it would have to actually be big enough to be the crater. Am I missing something? I get that this is an Except question, that's not why I got this wrong. Why is this B right?

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on February 5, 2021

You can find the explanation at the link below. I end up using that site a lot because they actually explain answers that aren't on here.,extinction%20of%20plant%20and%20animal.