The correct option is C division
Repeated subtraction is also known as division.
For example, If there are 30 balls and we form a group of 6 balls each. Here, the number 6 will be repeatedly subtracted 5 times. We can say that the number 6 has been subtracted 5 times from 30. So, we can write this subtraction as 30 ÷ 6 = 5.