Concept:The degree of a polynomial is the highest exponent (power) of the variable present in the polynomial.Explanation:The given polynomial is 5y−2. The term 5y has the variable y raised to the power 1. The constant term 2 has no variable, so its power is 0.Since the highest power of the variable y is 1, the degree of the polynomial is 1.Answer:The degree is 1, which corresponds to option C.