Which answer best represents a statement of fact?

Indeed, one hour after Japanese air squadrons had commenced bombing in the American Island of Oahu, the Japanese Ambassador to the United States and his colleague delivered to our Secretary of State a formal reply to a recent American message.

. . . the unbounding determination of our people . . .

. . . the American people in their righteous might . . .

Since the unprovoked and dastardly attack by Japan on Sunday, December 7, 1941, a state of war has existed between the United States and the Japanese Empire.

The answer which best represents a statement of fact is, Since the unprovoked and dastardly attack by Japan on Sunday, December 7, 1941, a state of war has existed between the United States and the Japanese Empire.

Option D.

Explanation:

A description of fact is a statement that is real and which is based on facts rather than personal opinion. Facts are something that has occurred, happened, or took place for real. The sentence, 'Since the unmotivated and cowardly strike by Japan on a fine Sunday, in the month of  December 7, 1941, a state of battle has been with the US and the Japanese Empire' indicates a statement of fact because it contains a proper factual details of the occurrence. The other mentioned statements on the different hand simply provide an opinion and general information, and not fact.