Believe me, this dress may be expensive but it's worth it because it'll give you a real _____ in the interview.
【正确答案】 C
【答案解析】解析:考查习语。give sb.an edge意为“给……予优势,令……脱颖而出”,其他均不是固定搭配,也无此特定含义。allowance意为“补助,津贴”等;bonus表示“奖金,红利”;profit意为“利润,赢利;益处,得益”。