You can change the height or width of an object and have the other dimension automatically adjust to maintain the proportion with the _________ option

For optimal signal quality, which of the following is correct concerning wireless antenna placement?

A. Place the antenna near a doorway facing into a room. B. Place the antenna as high as possible in the center of the service area. C. Wireless antennas must always be placed in the line of sight. D. Always use a Yagi antenna for 360° broadcasts.

A(n) ____ provides controls for a game so that the user can play the game.

A. game engine B. user interface C. math engine D. physics engine