더운 여름이 어떻게 지나갔는지 모를 정도로 날이 많이 시원해 졌습니다.
다름이 아니라, 궁금한 내용이 있어서 문제와 답을 함께 올려봅니다.

(문제)
last week, i got a huge package in the mail. at first, i didn’t know what it was. ⓐgiven the enormous size of the box, i didn’t think it could possibly be the cellphone case i had recently bought online. i looked through the packaging in the box, and guess what i found! another little box! and in this little box, i finally found my new cellphone case, ⓑwrapped in bubble wrap and plastic.
i was glad to receive the product i had ⓒordered in perfect condition, but so much packaging seemed unnecessary. i realized that this kind of wasteful packaging must be bad for the environment.
so i went online, and while ⓓlooking for ways to avoid wasteful packaging, i discovered “green shopping.” i’d like to share what i’ve learned. in short, “green shopping” means shopping with the environment in mind: buying products that help ⓔconserving precious resources, save on energy use, and prevent unnecessary waste. here are ads i found from eco-friendly companies that provide creative ways to “shop green.”

윗글을 한 문장으로 요약하고자 할 때 빈칸 (a)와 (b)에 들어갈 알맞은 표현을 고르시오.
the real concept of green shopping means that we have to ( a ) our ( b ) before we buy something.

(a) (b)
① complain ------ treasure
② criticize ------- souvenir
③ distinguish ----- atmosphere
④ purchase ------ encyclopedia
⑤ consider ------- circumstance

정답은 3번인데요.. circumstance라는 단어가 environment와 유사하게 사용될 수 있다고 들어서 그러는데요.. 이 문제의 경우는 사용할 수 없을까요? 조언 부탁드립니다.