Minivans carry as many as seven passengers and, compared with most sport utility vehicles, cost less, get better gas mileage, allow passengers to get in and out more easily, and have a smoother ride.

A.     Minivans carry as many as seven passengers and, compared with most sport utility vehicles, cost less,

B.     Minivans, which carry as many as seven passengers, compared with most sport utility vehicles, they cost less,

C.     Minivans carry as many as seven passengers, in comparison with most sport utility vehicles, and have a lower cost, they

D.     Minivans, carrying as many as seven passengers, compared with most sport utility vehicles, cost less,

E.      Minivans, which carry as many as seven passengers, compared with most sport utility vehicles the cost is lower, and they

选a 有什么不妥之处,答案是选d

d中的compared，修饰对象也好象有点模糊