问题
_ difficult and challenging the task may be, wemust finish it on time, because there is a possibility _______our work will godown in history.
A:40％as lower priceas
B:40％as low a price as
C:as 40％low priceas
D:However; that
B:40％as low a price as
C:as 40％low priceas
D:However; that
正确答案是：
