5.
Which supporting sentence makes use of an example?
If you want to lose weight, interval training is the way to go.
Interval training quickly improves your stamina.
Beto used interval training to prepare for-and win-a marathon.
Four out of five of the athletes polled use interval training.

The supporting sentence that makes use of an example is:

Beto used interval training to prepare for and win a marathon.

In this excerpt, the first sentence is the topic sentence, which is the sentence that contains the main idea. The second sentence is the supporting sentence that gives the reader further information about the topic. In the third sentence, the writer gives a specific example to support the main idea. Finally, in the last sentence, the writer provides factual information to make the topic sentence more relevant.  

the answer is   b suffix addition

what are you asking?