Which statement correctly describes the divisibility rule for 4?
A number is divisible by 4 if its last digit is 0, 2, 4, 6, or 8
A number is divisible by 4 if the sum of its digits is divisible by 4
A number is divisible by 4 if its last two digits form a number divisible by 4
A number is divisible by 4 if it is divisible by 2