GMAT Club Series #5 : Customers

5. Our customers oftentimes complain of having to spend too much time in lines in our groceries stores. They believe that we rob them of their active time and demand changes. Therefore, ......
Choose one of the following statements for the best solution to the problem above:

a. we should install bigger screens behind the cashiers' desks in order to show stock market data, a soap opera and a sports channel at the same time, as we know from our research that most of our customers are businesspeople, housewives or sports lovers.
b. we need to increase the prices on all our products a little bit during the time when we have longest lines in order to shift the people who do not want to pay more to the hours when our stores are not as busy.
c. we need to lower the prices of our products one cent per package in order to enable our customers save money during the hot hours.
d. the best solution would be to introduce a system of checkin and checkout in lines and for each minute spent in line grant our customers ten cents for future purchases.
e. we need to conduct a research of how many minutes customers of other groceries stores spend in lines in order to persuade our customers that they are better off shopping in our groceries stores than in our competitors, in case our lines move faster.