单选题 (Although) the wages for all the members of the working staff (increase regular), so (their expenses do); for the prices for everything (are increasing dramatically) at the same time.

A、 Although
B、 increase regular
C、 their expenses do
D、 are increasing dramatically

【正确答案】 C

【答案解析】应改为do their expenses，与前面so联系起来，表示“…也…”。