In the given options, the context clue in the passage that helps the reader understand the meaning of the word diligent is "avoid betraying."
The correct answer is option b.
The word diligent means to be careful, thorough, and persistent in doing something. In this case, the context clue "avoid betraying" provides a hint about the meaning of diligent because someone who avoids betraying others is likely to be careful, thorough, and persistent in their actions.
To further understand the meaning of diligent, let's look at an example. Imagine a student who is described as diligent in their studies. This means that the student is hardworking, consistently putting effort into their studies, and being thorough in understanding and completing their assignments. They are not easily distracted and are committed to achieving good grades.
In conclusion, in the given options, the context clue "avoid betraying" helps the reader understand the meaning of the word diligent by suggesting that someone who avoids betraying others is likely to be careful, thorough, and persistent in their actions.