(A) ** sugar plantations were very valuable
(B) an abundance of oil was discovered
(C) to develop a military base
(D) to learn the culture of the natives
EXPLANATIONS BELOW
Concept note-1: -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-2: -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.
Concept note-3: -American sugar planters got outside law to gain control over Hawaii by forming the secret society called Hawaiian League. The purpose of it was to overthrow the monarchy and establish democracy in Hawaii under the control of Americans.