Which of the following is an example of a binary operator?

A binary operator is an operator that requires two operands to perform its operation. In programming, binary operators perform operations such as addition, subtraction, multiplication, and division, among others.

The expression "A + B" illustrates a binary operator because it clearly involves two operands, A and B, and uses the addition operator (+) to combine them. This is the essence of binary operations—taking two inputs and producing a single output.

In contrast, the other options do not meet the criteria. The "+5" is a unary operation, which interacts with a single operand (implicitly understood to be 0 in some contexts, leading to 0 + 5). The "++" is not a standard binary operator in Python, though it does suggest an increment operation which also requires a single operand, making it unary. Lastly, "abs(-1)" is a function call rather than an operation with two operands; it operates on a single value (-1) to return its absolute value.

Thus, "A + B" is the definitive example of a binary operator, performing an operation with two distinct arguments.