A method a. may have zero or more parameters b. never has parameter variables c. must have at least two parameter variables d. may not have only one parameter variable

The answer is "Option a"

Explanation:

A method is a technique, that associated with both a message and an object. It includes information, behavior, and actions of an interface defining, how the object can be used, and wrong choices can be described as follows:

In option b, It includes parameters in the method. In option c, It contains a parameter, that may be one or more. In option d, It contains one parameter also.