Because of greater competition in the telephone industry, long-distance phone calls are now 25 percent cheaper than they were just a few years ago. Yet surprisingly, the average household's bill for long-distance services increased by one-third over the same time period.
Which of the following, if true, would most directly explain the higher long-distance bill paid by the average household?
A) Although long-distance calls made by individual callers are now less expensive, the cost of long-distance calls made by businesses and institutions has gone up.
B) Rates for calls made during the evening, the time when most consumers make long-distance calls, have gone down.
C) Profits earned by telephone companies continue to increase despite the decline in rates charged for long-distance service.
D) The use of electronic mail, which is far less costly than long-distance telephone service, has increased by 800% over the past several years.
E) Cheaper long-distance rates have encouraged households to call more frequently and talk for longer periods of time than they did when the service was more expensive.