Urgent(Thank you in advance)-A challenging Question need to be solved!

In order to promote off-season bbusiness, Mt. Dunmore Lodge made the following "Welcome Back" offer to their winter guests: guests who rent a room for at least a week during ski season can come back during the summer and get 25 percent off the standard summer price of any room they rent. After the summer passed, the owneers of the lodge determined that the majority of their guests had taken advantage of the "Welcome back" offer and paid the reduced rates. however, they were surprised to find they still managed to rent more rooms at full price than they did at the discount rate.

Which one of the following, if true, most helps to explain te apparent descrepancy in the passage?

A. Most of the guests who stayed at Mt. Dunmore Lodge during the winter did not stay for afull week.

B. Those guests taking advantage of the Welcom back" discount were more likely to bring their families with them than were those gguests who were paying full price

c. some of the guests who received the "welcome back" discount also received a 10 percent rate reduction through their auto club.

d. IN order to pay for the construction of a new gym and a new pool, the owners of the lodge raised their summer prices considerably.

e. On average, guests who took advantage of the "welcome back" discount spent more money at the hotel on additional goods and services than guests who paid full price for their rooms.

Please let me know what is the answer and why.