Indefinite Terms of Office Refer to Which of the Following

Indefinite terms of office refer to which of the following?

A) The length of time the United States president can serve during war time, as authorized by Congress
B) The way in which the British prime minister can serve as long as the people will continue to reelect his or her party
C) The way in which the British prime minister can call for a vote of no confidence and be removed from office
D) The way in which the Indian president is elected and the absence of term limits
E) The way in which the British monarch can dismiss an unpopular prime minister