Decrement operator, −−, decreases the value of variable by what

decrement-operator-decreases-the-value-of-variable-by-what

Decrement operator, −−, decreases the value of variable by what number?

A. 1

B. 2

C. 3

D. 4

This question was addressed to me during an online exam.

I want to ask this question from Arithmetic Operators in division Operators and Control Statements of Java

The correct answer is A. 1

To elaborate: None.