Which of the following would be the BEST design construct to allow developers to group functions and properties for reuse when designing an application?

A constant is a fixed value that cannot be changed during program execution and does not group functions or properties.

A vector is a data structure, often an array, used to store a collection of elements of the same type, not to group functions and properties for reuse.

A function (or method) is a block of organized, reusable code that performs a single, specific action, but it doesn't serve as a blueprint for grouping both functions and properties into a cohesive unit.

A class is a blueprint for creating objects, allowing developers to define a collection of related functions (methods) and properties (attributes) that encapsulate a specific entity or concept. This object-oriented programming construct promotes code reusability, modularity, and easier maintenance by creating instances (objects) from the class.