I believe your answer is B
Jumonville's murder in captivity incited a strong French response, and Washington was unable to defend his makeshift Fort Necessity from French forces led by Jumonville's half-brother. Washington surrendered on July 4 and signed a confession—in French, which he could not read—to Jumonville's assassination.
When 9/11 happened the bombing
The expansion of railroads created more ways for things such as general goods to be shipped elsewhere to buyers or companies. (Hope this helps a bit, sorry for such a short answer.)
