The right answer is C.Objective: A manufacturer of men’s dress socks sought to increase profits by increasing sales.
Premise: The size of its customer pool was remaining steady, with the average customer buying twelve pairs of dress socks per year.
Plan of the Company: The company’s plan was to increase the number of promotional discount-sale periods to one every six months.
From the argument above, the company intends to increase its profits by increasing sales. This comes from a background that the company's customer pool was remaining steady, and on average, a customer purchases twelve pairs of socks per year. So the manufacturer plans to increase the number of promotional discount-sale periods to one every six months.
Our task is to weaken the effectiveness of the plan.
Option A states that new manufacturing capacity would not be required if the company were to increase the number of pairs of socks sold. This does not weaken the argument in any way. A could rather be seen as somewhat strengthening the plan as the manufacturer will not be required to spend money to increase its manufacturing capacity.
Option B states that inventory stocks of merchandise ready for sale would be high preceding the increase in the number of discount-sale periods. This is irrelevant to the plan of the manufacturer.
C. The manufacturer’s competitors would match its discounts during sale periods, and its customers would learn to wait for those times to make their purchases. This weakens the effectiveness of the plan. So if the customers will wait to purchase only during the promotion periods, then the effectiveness of the plan above is in question as the manufacturer may not see the expected increase in sales revenue. Purchases will be high during the promotion period and low during the periods when the promotion is not running. Besides, if their competitor matches their discount, then there is little chance that the manufacturer can attract new customers in order to increase their annual revenue.
D. New styles and colors would increase customers’ consciousness of fashion in dress socks, but the customers’ requirements for older styles and colors would not be reduced. This neither strengthens or weakens the argument. We cannot determine based on this information if purchases will go up or come down.
E. The cost of the manufacturer’s raw materials would remain steady, and its customers would have more disposable income. As in D, we are unable to automatically conclude based on this information that purchases of socks would increase or that the number of customers of the manufacturer will go up.