The correct option is A Numbers less than 7
When a number is divided by 7, all the numbers less than 7 (0, 1, 2, 3, 4, 5, and 6) are the possible remainders.
When a number is completely divided by 7, the remainder is 0.
Whereas, when a number is not completely divided by 7, the possible remainders are 1, 2, 3, 4, 5, and 6.