Multi-choice problem: Continue writing the next sentence in this paragraph:

A racatac is shown in a white room. A racatac is shown in a commecial showing the prices. different racatacs in sizes and models

Choices:
- are at different sizes of racine.;
- are shown with different tarps in front of them.;
- are shown in a room.;
- are in a competition.;
are shown in a room.