The text of a header should always be larger than the text of the document

In the class String, the substring method inserts a string into another string.

Answer the following statement true (T) or false (F)

The purpose of a ____ is to identify the data type of the value returned by the function, if any, provide the function with a name, and specify the number, order, and type of values expected by the function.

A. function declarator B. prototype C. function body D. function header