Same I dont understand how C. wasn't the answer because they did use the same amount of instruments (50) for each
Emil-KunkinOctober 22 at 04:39PM
For three, we are looking for an answer choice that cannot be true. We are told that the entire southern half of the region was covered by water during the C period, and that dinosaurs did not live in water. Therefore we know that they did not live in the southern part of the region during the C period. Since the C period is part of the M period, they must have not lived there during the entirety of the M period.
It looks like the other question is about 5. For 5, C could be true. The passage doesn't say they used 50 instrument. It says they did 50 sterilizations of a set. This tells us nothing about how many instruments are in a set.
