Samuel has an actual weight of 1553 N. When he measures his weight in a moving elevator, he measures an apparent weight of 1615 N. Which of the following statements is accurate about Samuel's moverent in the elevator?
a. The elevator is accelerating upward
b. The elevator is moving upward at a constant velocity.
c. The elevator is accelerating downward.
d. The elevator is moving downward at a constant velocity.