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