Answer:
B.
Pick a background color, and count the number of colors in the game
C.
Pick an object at random, and keep track of how many copies of an object are left in a game
D.
Pick a maximum score, and count the number of points that have been scored
Explanation:
An option does not look like the correct option, as nothing is picked in this option. And rest of the options looks like being fine. But B option might run for infinity. However, it is a possibility definitely, by setting count =0 and incrementing it each time new color arrives. It's possible. And hence B. C. and D. options are correct.