Choose the Answer Which Best Rewords the Italicized Portion

Multiple Choice

Choose the answer which best rewords the italicized portion. If you think the original wording is best, choose option A.
Because of the preemptive strike, Japan was able to carry out its plans for Southwest Asia and the Indonesian Archipelago.

A) Because of the preemptive strike,
B) And the preemptive strike,
C) The preemptive strike
D) The strike was preemptive