Answer:
B.
It highlights the sense of discontentment between the British government and the American people.
Step-by-step explanation:
2 things:
1) "Discontentment" means dissatisfaction
2) The sentence above tells us that there are issues between the British government and Americans. "Trust it not, sire; it will prove a snare to your feet" means they're going to be trapped and shouldn't trust the British government.