Answer:
the answer is B. Machiavelli uses reasoning and an example as evidence in an argumentative structure to support his claim that a prince must destroy a city that is accustomed to freedom if he wants to hold it.
In this situation, credited means "to pay respect to".
Knowing this, the sentence "Lily's parents credited her for her efforts at finding a summer job" can be changed to "Lily's parents [paid respect to] her for her efforts at finding a summer job" and the sentence still makes sense.
What other sentence can you replace the word credited with the phrase "paid respect to" and it will still make sense?