Foreign Direct Investment (FDI)from the United States to the Rest

Foreign direct investment (FDI) from the United States to the rest of the world reached a record high of $1.4 trillion from 2010 to 2013.This volume of FDI was _________ the U.S.average a decade before.

A) one and a half times
B) double
C) almost three times
D) five times
E) more than nine times