When a fine caterer produces 30 catered meals, its marginal cost and average variable cost each equal $10. Therefore, assuming normally shaped cost curves, at 29 meals:
a) its marginal cost is less than $10 and its average variable cost is more than $10.
b) its marginal cost and its average variable cost are each equal to $10.
c) its marginal cost is greater than $10 and its average variable cost is less than $10.
d) its marginal cost and its average variable cost are each greater than $10.