1. What can you assume a scientist has done
if he or she postulates a theory?

they could have use some evidence to get this theory.

let's say that the scientist wanted to prove that air didnt exist. you cant see it. that's proof that it maybe doenst exist (of course air exists...I think).

d. pushing his plate away from the edge of the table idk what the other guy was trying to

last one is the answer