The correct answer is B. Modulus.
The modulus operator, also called the remainder operator, is a mathematical operator that gives the remainder when one number is divided by another. For example, the modulus of 7 divided by 3 is 2, because 7 ÷ 3 = 2 with a remainder of 2.
The modulus operator can be used to determine whether a number is even or odd. A number is even if the modulus of the number divided by 2 is 0. A number is odd if the modulus of the number divided by 2 is 1.
For example, the number 2 is even because 2 ÷ 2 = 1 with a remainder of 0. The number 3 is odd because 3 ÷ 2 = 1 with a remainder of 1.
The other options are incorrect because they do not give the remainder when one number is divided by another. Addition, subtraction, and integer division all give a result that is a number, not a remainder.