Which of the following statements is true?
AA positive whole number is divisible by 4 if and only if its square is divisible by 4.
BA positive whole number is divisible by 4 if and only if its last two digits form a number divisible by 4.
CA positive whole number is divisible by 4 if and only if it has an even number of even factors.
DA positive whole number leaves a remainder of 1 when divided by 4 if and only if it is odd.
ENone of the above