If the Mass of Earth Somehow Increased with No Change

Multiple Choice

If the mass of Earth somehow increased with no change in radius, your weight would

A) increase also.
B) decrease.
C) remain the same.
If instead, both Earth's mass and its radius doubled, your weight at Earth's surface would be
D) half before the changes.
E) the same as before the changes.
F) twice.
G) four times greater.