Roshambo: so simple, yet so...stupid?

You have exactly three choices. (Real life works this way.) If you choose wisely, the answers you seek will become apparent. Pick only one:

Computers never lose at some games. (This is not one of those games, fortunately.) Warning: I'm going rock.

Note:
It's SUPPOSED to be random. But because of caching, it's not always. If you choose the same link, you may have to use your browser's "Reload" feature to play again; otherwise the computer might always pick the same thing over and over again.