Many stock traders in the United States have set out to become global investors, convinced that limiting their investments to the U.S. stock market, even though it is certainly home to the stocks of some of the world’s great corporations, restricted their gains.

(A) even though it is certainly
(B) which, while it is certainly
(C) despite that that market is certainly
(D) which, though certainly
(E) although, certainly as



OA A

Source: Official Guide