Ahmad owns four activities. He participated for 120 hours in Activity A, 150 hours in Activity B, 140 hours in Activity C, and 100 hours in Activity D. Which of the following statements is correct?
a.) activities A, B, C, and D are all significant participation activities.
b.) Activities a, b, and c are significant participation activities
c.) ahmad is a material participant with respect to activities a, b, and c
d.) ahmad is a material participant with respect to activitivies a, b, c, and d.
e.) none of the above