The answer is D. an equal distance with an equal amount of force.
This is because the two cylinders have the same diameter and the liquid inside them will not compress. So when one of the pistons (both pistons are also equal size) is pressed, the same amount of liquid is moved from one to another.
A short term environment change would be drought, smog, volcanic eruptions, and blizzards. All because it only last for a small period of time and it can affect the way certain species will have to adapt to certain environments.
C. It begins with 3/8 and 1/3, and we need to make it 5/8 and 2/3, and the one that does that is C.
1, 2, & 4 are ways it benefits students. The other two choices seem to be more about study skills rather than student self reflection benefits.