The Sales Revenues of TransCanada Distributors Have Increased Since Last

The sales revenues of TransCanada Distributors have increased since last year.The sales manager thinks that as a result the company should now be more profitable.Which of the following would weaken the sales manager's argument?

A) TransCanada's customers are happy with the company's services.
B) Shipping costs for the industry have increased since last year.
C) TransCanada's employees are dissatisfied with the company's working conditions.
D) There has been a slowdown in the industry.
E) Most of TransCanada's employees are new to the business.