Impact craters caused by meteorites smashing into Earth have been found all around the globe, but they have been foun...

Alejandra Tuesday at 09:12PM

I'm not sure, but D is if you were telling someone to hold all factors constant. They talk about higher density of crates in certain areas. Ok, great, so from there you want to assume that the spread is to some degree equal so that you can make the assumption in the last sentence.