Answer:
d. The US conquering Hawaii
Step-by-step explanation:
George Frisbie Hoar was an American politician and Senator of the United States from 1877 to 1904.
During the Spanish-American War, Hoar supported president McKinley to add Hawaii in the United States. He supported the annexation of Hawaii for U.S. imperialism. Hoar thought that the addition of Hawaii will help the won of the United States over Spain.
Hence, the correct answer is "d. The US conquering Hawaii".