What Is the Most Common Trigger for Avalanches in Recreational

Multiple Choice

What is the most common trigger for avalanches in recreational accidents?

A) a person's weight added to a slope that is near failure
B) daytime heating of the upper snowpack, which weakens the near-surface layer
C) inflow of warm air funneled upward from a valley, weakening the near-surface layer
D) skiers deliberately attempting to release unstable snow before they ski down a slope
E) bad weather