Which of the Following Statements Is True of the Presidential

Which of the following statements is true of the presidential age? 

A) The Constitution states that anyone who is twenty-five years of age or older can become president. 
B) The oldest person elected president was John F. Kennedy. 
C) The youngest person to hold the office of president was William McKinley, who was forty-two when he became president. 
D) The youngest elected president was Ronald Reagan, who assumed the presidency at the age of forty-three.  
E) The average age at the presidential inauguration has been fifty-five.