This is a test of commonsense with single/multi-choices. Complete the next sentence:

A christmas tree stands undecorated in a living room. Two people decorate the tree with a light cord. three people

Possible answers: A). decorate icy stairs with bulbs.; B). climb from the the top of the tree.; C). decorate the tree with blue and silver balls.; D). decorate the tree with a blue hand light attached to a video camera.;
The answer is:
C).