Context: Read the text about an animal in motion.
A gecko used its sticky feet to crawl from the bottom of a window to the top of the window.
Complete the statement. Assume that the gecko's mass did not change.
The gravitational potential energy stored between the gecko and Earth () as the gecko crawled on the window.
A. stayed the same
B. decreased
C. increased
From the given choices, pick the correct answer and respond by indicating the letter of the correct option.

C