Context: Read the text about a person in motion.
Bobby rode an escalator from the first floor to the second floor of a shopping mall.
Complete the statement. Assume that Bobby's mass did not change.
The gravitational potential energy stored between Bobby and Earth () as he rode the escalator.
A. decreased
B. stayed the same
C. increased
Identify the correct option from the choices provided and respond with the letter of the correct option.

C