Jayden Donates His Time to a Nursing Home Every Friday

Jayden donates his time to a nursing home every Friday after school. Sometimes this means he misses hanging out with his friends for certain events. However, Jayden is committed to volunteering at the nursing home because his grandfather is one of the residents. He only misses his regular routine at the nursing home for very special occasions. Because Jayden must sometimes sacrifice events with his friends to volunteer, this represents a(n)

A) variable cost.
B) opportunity cost.
C) fixed cost.
D) steady cost.
E) off-peak cost.