The phrase "all men are created equal" has evolved in its interpretation in modern U.S. society. The correct interpretation is:
D. Originally it referred only to white men, but today it includes all people.
In the past, when this phrase was written, it mainly referred to white men of property and status. Over time, the understanding and application of this principle have expanded to encompass all individuals, regardless of race, gender, or social standing. This evolution reflects the ongoing progress towards equality and inclusivity in American society.