What is Converter in Backbone.js?

A)  Converters are the type of compilers that are used to convert one programming language into another.
B)  The converter is an interface describing a Java class that can perform Object-to-String and String-to-Object conversions between model data objects and a String representation of those objects.
C)  When a model's attribute is copied to an HTML element or when an HTML element's value is copied into a model's attribute, a function is called; this function is known as a converter in Backbone Js.
D)  None of the above.

Correct Answer :   When a model's attribute is copied to an HTML element or when an HTML element's value is copied into a model's attribute, a function is called; this function is known as a converter in Backbone Js.