___ clues are what the author gives the definition and an example clue in the text

I believe this is the definition for example clues.

Explanation:

We often hear of context clues, but authors can also employ example clues. Example clues can be found when authors give an example that facilitates the  understanding of an unfamiliar word by the reader. A regular context clue would not offer an example. Example clues tend to use the terms "such as", "for instance", "for example", "to illustrate", among others.

c) problem and solution

the answer is c

hope this