They are happy. the character is crying tears of joy.
The answer is "when the surrounding words are unfamiliar".
The b best answer that I could see is D because it correlates to the actual question. But c also looks good because it gives a reason as why not to buy them from a shop/private owner.
Best of Luck...Nathan...L.
B is the answer
Explanation
You should ask yourself: "Who are my readers?"
