Here is the correction:
She couldn't take it any longer; it was just too much for her.
OR...
She couldn't take it any longer. It was just too much for her.
When you do math you are adding, rooting, graphing etc. When you are doing social studies you are studying people and population. It can also be about geography and how people live today. You are being social.
You need a subject.
Example subject: dogs and cats.
Compare: They both have fur.
Contrast statement: Dogs are energetic and cats are lazy.
P.S It makes it easier if you make a ven diaphragm
Your answer is A: Ivan wanted to be alone so he could dispose of the nose-Apex