Final answer:
The medium that combines sight, sound, and motion for advertising with a low cost per exposure is television.
Step-by-step explanation:
The medium that combines sight, sound, and motion and has the advantage of appealing to the senses with a low cost per exposure is television (B). Television has been a dominant form of mass media since the 1950s and continues to be a powerful medium for advertising due to its reach and the multi-sensory experience it provides. In comparison to other media such as newspapers, direct mail, and radio, television incorporates visual imagery, dynamic content, and audio, which can be more engaging for audiences. Additionally, while television advertising can be expensive in terms of raw costs, the cost per exposure is often lower because it reaches a large audience simultaneously.