To solve this question, the user needs to know about short-circuit evaluation in programming languages, particularly in the case of the "&&" operator.

The correct answer is:

The Answer is: A

Explanation:

In programming languages, the "&&" operator represents the logical AND operation. In this operation, if the first expression (exp1) evaluates to false, then the second expression (exp2) is not evaluated because the entire expression is guaranteed to be false. This is known as short-circuit evaluation.

For example, consider the following code:

if (x != null && x.isValid()) {
    // do something
}

In this code, if x is null, then the second expression (x.isValid()) will not be evaluated. This is because the entire expression (x != null && x.isValid()) is guaranteed to be false if x is null. This can improve performance and prevent errors that might occur if the second expression is evaluated when x is null.

Therefore, option A is correct because both the boolean expressions are not always evaluated when the "&&" operator is used.