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Which of the following is true?

A If a number is divisible by 2 and 3, it is also divisible by 6.
Explaination
It is true that if a number is divisible by both 2 and 3, it is also divisible by 6. For example, 108 is divisible by 2 (108 ÷ 2 = 54) and by 3 (1 + 0 + 8 = 9 ÷ 3 = 3), and therefore is also divisible by 6.
B If a number is divisible by 5, it is also divisible by 10.
C If a number is divisible by 1, it is also divisible by 2.
D If the last 3 digits of a number are divisible by 2, then the number is divisible by 4.