请教GWDTN2-39

poppy9696

GWD3-Q39:
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

为什么答案有争议？ A或D? 我选D. D哪错了？A不平行。

谢谢了！