(A) ** sugar
(B) oil
(C) pineapple
(D) gold
EXPLANATIONS BELOW
Concept note-1: -Hawaiian sugar planters were now being undersold in the American market, and as a result, a depression swept the islands. The sugar growers, mostly white Americans, knew that if Hawaii were to be annexed by the United States, the tariff problem would naturally disappear.
Concept note-2: -The U.S. needed Hawaii to reinforce its presence in the Pacific region and to protect the West Coast of the United States.
Concept note-3: -A key provisioning spot for American whaling ships, fertile ground for American protestant missionaries, and a new source of sugar cane production, Hawaii’s economy became increasingly integrated with the United States.