Answer: B) replace the unfamiliar word with a synonym to see if the sentence makes sense.
Explanation: Context clues are hints that an author gives to help the reader understand a difficult or unusual word within a sentence or paragraph. When we are reading and we find an unfamiliar word, we should use the context clues to determine its meaning, and after that, in order to verify if we really know the meaning, we should replace the unfamiliar word with a synonym to see if the sentence makes sense.