When spotting a dead lift, it is important to
a. move up and down as the lifter moves
b. keep your hands on the bar at all times
c. remember not to touch the lifter unless needed
d. stay away from the lifter so they don't fall on you select the best answer from the choices provided. a b c d?

c. remember not to touch the lifter unless needed

Explanation:

The spotter is the person that help the one doing the exercise to have a safe routine, he sets behind him in case he is loosing control of the lift or the bar and there´s chance of an accident, he is there to secure the bar if needed, so he should not touch the lifter unless needed to let him exercise properly.

exercising at a moderate intensity, and slowly increasing the duration.