제가 써놓은 답과 이 이유가 맞는지 확인좀 부탁드립니다^^

다음 글에서 밑줄 친 부분 중 어법상 틀린 것은 ?
Do you remember (A)to buy your first home ? It gave your family a sense of security, comfort and belonging in a way that (B)was unmatched by anything else you could give them. But for many working families in Arizona, the dream of owning a home is growing ever more distant as the price of housing increases (C) much faster than incomes. Housing For Mesa, inc (HFM) helps working families reach the dream of home-ownership. You can (D) help us help others by contributing to HFM and (E) earn a tax credit for yourself.

답 :
A 이유 : 집을 샀던건 과거라서 to buy가 아니라 buying...
생각보다 답은 시웠던거 같은데.. 해석이 너무 어렵습니다..^^;
제가 한 해석에 좀 수정좀 부탁드리구 답도 맞는지 궁금합니다^^