13. GWD-18-Q18

The first shots of the American Revolution, fired at Lexington and Concord.  Massachusetts, were, according to legend, heard around the world, but news of these shots, which were sent by swift messenger, took four days in reaching New York City as well as another additional eleven days to reach Charleston, South Carolina.

A.      shots, which were sent by swift messenger, took four days in reaching New York City as well as another additional eleven days

B.       shots that was sent by swift messenger took four days in order to reach New York City, and also another eleven days

C.      shots that were sent by swift messenger took four days to reach New York City and another eleven days

D.      shots took four days by swift messenger in order to reach New York City and another eleven days in addition

E.       shots took four days by swift messenger to reach New York City and another eleven days

答案是E,我选的C，为什么sent可以被省略啊？？