Which of the following is a requirement for the President of the United States?

To serve as President of the United States, one of the fundamental requirements is that the individual must be a natural-born citizen. This criterion ensures that the President has a strong allegiance to the nation from birth, which is especially important given the responsibilities of the office and the need for national loyalty.

Other requirements include being at least 35 years old and having been a resident of the United States for at least 14 years. However, there is no stipulation regarding the necessity of a college degree or prior military experience. Therefore, the requirement to be a natural-born citizen is unique and essential for the eligibility to become President, which is why this option is correct.