Enabling reuse of code through extending the functionality of classes describes ____ as it relates to object oriented development.

Two vertices A and B of a graph are adjacent if:

A. they are drawn next to each other B. you can follow a connection between A and B, so that you can reach B from A. C. A is next to B in the adjacency matrix D. A is next to B in the adjacency list

A(n) ____________________ is a mobile computing device designed for single-player or multiplayer video games.

Fill in the blank(s) with the appropriate word(s).