what is bullet climbing?

a. climbing on dangerous cliffs at night
B. climbing with a large group during the day
C. climbing fast during the day
D. climbing at a fast pace during the night

C. climbing fast during the day

Bullet climbing refers to climbing at a fast pace, often without pauses or breaks, in order to cover a lot of ground quickly. It is typically done during the day to take advantage of the daylight and good weather conditions.