Consider the following schedule of activities, unit cost, and total costs: Activity Units Total Cost Cost/Unit Units Total Cost Cost/Unit Activity A 19,200 $24,000 $1.25 24,000 $24,000 $1.00 Activity B 19,200 $28,800 $1.50 24,000 $36,000 $1.50 Activity C 19,200 $31,6EN $1.65 24,000 $36,000 $1.50 Which of the following is correct with respect to each activity and the cost classification of that activity? Activity A: Fixed cost. Activity B: Variable cost. Activity C: Semivariable cost Activity A: Variable cost. Activity B: Fixed. Activity C: Semivariable cost Activity A: Fixed cost. Activity B: Semivariable cost. Activity C: Variable cost Activity A: Semivariable cost. Activity B: Fixed cost. Activity C: Variable cost Activity A: Semivariable cost. Activity B: Variable cost. Activity C: Fixed cost