Several years ago, visitors to Disneyland had to purchase a separate ticket for each ride they went on. E Rides were the most expensive, and there were several categories of less expensive rides. Now visitors to Disneyland pay a single entry fee, which entitles them to go on any ride they wish as often as they wish. Compared to the old way of allocating rides at Disneyland, the new allocation mechanism
选项：

A:is more efficient.;
B:is less efficient.;
C:favors wealthier visitors to Disneyland.;
D:generates more total economic surplus.