When the "full-cost approach" to marketing cost analysis is used, allocating fixed costs on the basis of sales:
A. may make low-volume customers appear more profitable than they are.
B. increases each customer's contribution margin.
C. decreases the profitability of the whole business.
D. makes large-volume customers appear more profitable that they are.
E. increases the profitability of the whole business.
Answer: A. may make low-volume customers appear more profitable than they are.