The statement “more high school boys than girls will disagree with school rules” is an example of a(n)

This can be classified as either an assumption or a generalization depending the context.

Without any given support a statement like this has no grounds. So the individual saying this could be making an assumption based on their own opinion or they are generalizing based on the opinions of a larger group of boys/girls. 

B. alice is pretending there is a way through the glass when in reality that would not be physically possible therefore she has to pretend. but i think d is also possible because alice notices the glass is actually melting away which is also not possible either

It's a, if this is wrong, i'm so sorry, i'm just trying to