gwd26-23 没找到答案

Trans World Entertainment Corporation, which owns the Record
                Town and Saturday Matinee retail chains, announced that since sales of up to one-fourth of its stores are poor, they will be closed.
                

A.     that since sales of up to one-fourth of its stores are poor, they will be closed.

B.     it is closing up to one-fourth of its stores, which accounted for its poor sales

C.     it was closing up to one fourth of its stores because of poor sales.

D. to be closing, on account of poor sales, up to one-fourth of its stores.

E.     having poor sales, such that up to one-fourth of its stores will be closed.

为什么选C呢

为什么不加个THAT

为什么用过去进行时呢