Question

if you reserved a machine for a certain time slot at a fitness facility, you should ask if you can use a different machine earlier stay within your allotted time limit use the machine an extra 30 minutes if no one appears to be waiting wait in line while the previous person finishes

Explanation:

Reserving a machine for a time - slot implies an agreement to use it within that allotted time. Using it within the allotted time limit respects the facility's rules and other users' reservations. Asking to use a different machine earlier may disrupt the reservation system. Using the machine extra time even if no one seems to be waiting is unfair to others with later reservations. Waiting in line while the previous person finishes is about queue - jumping if you have a reservation.

Answer:

B. stay within your allotted time limit