prep 2-35

Unlike the steam locomotive, which required an hour or two of firing up
before it was possible to move under its own power, nearly full power could
be summoned almost instantly from the cold engine of a diesel
locomotive.

(A) it was possible to move under its own power, nearly
full power could be summoned almost instantly from the cold engine of a diesel
locomotive
(B) it was possible to move under its own power, the diesel
locomotive's engine, when cold, could produce nearly full power almost
instantly
(C) it could move under its own power, the diesel locomotive could
summon nearly full power from a cold engine almost instantly
(D) moving under
its own power, the cold engine of the diesel locomotive could produce nearly
full power almost instantly
(E) moving under its own power, almost instantly
a diesel locomotive could summon nearly full power from a cold engine

答案是C，为何D不对。