The best title for this passage would be ______.

A．be engaged in everything from nuclear warheads to the outcome of all football matches
B．be a person of outstanding ability who meets many qualifications stated in the Constitution
C．be careful not to make mistakes when he is answering reporters' questions on his policies
D．be careful not to abuse his power because his power is checked by the other two branches

A．the President of the United States can enjoy some working vacations when he is too tired
B．no American Born Chinese can meet the qualifications for President of the United States
C．the President of the United States actually should meet more qualifications than those
stated in the Constitution
D．the President of the United States is playing a leading role among all the three branches of the US Government