[求助]糊涂了：再问两道: 大全300和374

300.      Following the destruction of the space shuttle Challenger, investigators concluded that many key people employed by the National Aeronautics and Space Administration and its contractors work an excessive amount of overtime that has the potential of causing errors in judgment.

(A) overtime that has the potential of causing

(B) overtime that has the potential to cause

(C) overtime that potentially can cause

(D) overtime, a practice that has the potential for causing（E）

(E) overtime, a practice that can, potentially, cause

Q: Why not D?

374.      In December of 1987 an automobile manufacturer pleaded no contest to criminal charges of odometer tampering and agreed to pay more than $16 million in civil damages for cars that were test-driven with their odometers disconnected.

(A) cars that were test-driven with their odometers disconnected

(B) cars that it had test-driven with their disconnected odometers

(C) its cars having been test-driven with disconnected odometers

(D) having test-driven cars with their odometers disconnected（D）

(E) having cars that were test-driven with disconnected odometers

Q: I think I have seen the discussion over this question in 885, but I can't remember its corredsponding no. in 885. NN, please analyze this quesition: why D is the key?

Thanks a lot!

300,不能说practice有潜力。

374，test-driven 不是定语，而是相当于谓语。having test-driven cars 是个动宾结构。

the possibility that something will develop in a particular way, or have a particular effect
potential for明明在longman中的解释是possibility呀～～严重支持此题选D！

Where is NN??