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

A comic of a man telling how to wash with a detergent. A house is shown with a sentence of how to wash the rooftop. the numbers and address

Select from the following.
[a]. appear on a red background.;
[b]. are shown in the advertising.;
[c]. are kept afloat by a subscribe.;
[d]. of the rooftop are then shown.;
The answer is:
[b].