What is the name for Java classes that are provided so that values of primitive data types can be treated as objects?

A) interfaces
B) extensions
C) wrappers
D) event handlers

Wrappers are a set of classes in Java that are used to create objects from the primitive data types. They allow these values to be treated as objects and offer methods to easily manipulate them. For example, the Integer wrapper class provides methods for converting string inputs into integer values, and for performing mathematical operations on these values.