Dena owns interests in five businesses and has full-time employees in each business. She participates for 100 hours in Activity A, 120 hours in Activity B,130 hours in Activity C, 140 hours in Activity D, and 125 hours in Activity E a. Dena is a material participant with respect to all five activities. Ob. All five of Dena's activities are signinicant participation activities. Oc Dena is a material participant with respect to Activities B, C, D, and E od. Dena is not a material participant in any of the activites. e. None of these choices are correct