______ traveling expenses rising a lot, Mrs. White had to change

______ traveling expenses rising a lot, Mrs. White had to change all her plans for the tour.
A、Since
B、As for
C、By
D、With
【正确答案】：A
【题目解析】：因为旅行费用上涨很多,怀特太太不得不改变她所有的旅游计划。