Final answer:
In Python, unary operators have the highest precedence among subtraction and multiplication, being evaluated before most other operations in an expression.
Step-by-step explanation:
According to Python's operator precedence rules, the operator with the highest precedence among those listed is B) Unary operators. Unary operators in Python include unary plus (+), unary minus (-), bitwise not (~), and logical not (not). They have higher precedence over most of the other operators, including subtraction (A) and multiplication (C).
For instance, in a Python expression, a unary operation such as -5 would be evaluated before a multiplication operation, hence it would be evaluated as -(5 * 2) rather than (-5) * 2, as per the precedence rules.