The two most popular dentists, Peter Winthrop and Mercy Carteret, work in the same office building. Both dentists have profits of four hundred thousand dollars and each spend twice the national average of their revenues on rent. Hence, if Ms. Carteret wants to have even more profits than Mr. Winthrop, she should move to a less expensive office building.
Which of the following, if true, would most weaken the argument?
A. Ms. Carteret has rejected her office manager's plan to purchase less expensive equipment.
B. Moving to a less expensive building would reduce rent by less than the amount of lost revenues resulting from a less centrally located office building.
C. Over the past three months five percent of Ms. Carteret's clients have left to become Mr. Winthrop's clients.
D. Ms. Carteret spends fifteen percent more of her revenues on rent than Mr. Winthrop does.
E. In a customer survey all of Ms. Carteret's clients indicated they would continue to be her clients should she change offices.