Question

which method adds 10 to the right end of the array myarray: (10) append index insert add

Explanation:

In many programming languages, the append method is used to add an element to the end (right - most position) of an array or list. The index method is for finding the index of an element, insert is for adding an element at a specific position, and add is not a standard array - specific method for this operation in common languages.

Answer:

append