Final answer:
An enumerated type is a data type consisting of a set of named constants. It allows variables to be assigned one of the predefined constants. The correct answer is a) A type that consists of a list of named constants.
Step-by-step explanation:
An enumerated type is a data type that consists of a set of named values called elements, members, or enumerators of the type. These names are identifiers that behave as constants in the language. Enumerated types are used to define variables that can only assign one of the values that have been predefined for it. Therefore, the correct answer to the question is:
a) A type that consists of a list of named constants
For example, in many programming languages, you can define an enumerated type Day which includes Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, and Sunday. Once the enumerated type is defined, you can declare variables of that type, and those variables can only be assigned one of the days as their value.