A vaccination program has a fixed cost of $2,000 and there are step-fixed costs. If the variable cost is $1.00 and the variable revenue is $1.50.

Select one:

a. The contribution margin is positive.

b. Marginal cost will always equal variable cost.

c. The break-even quantity will not change if variable revenue is decreased to $1.25.

d. A and B.

e. A, B, and C.