宾语从句的that可不可以省略？

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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
正确答案是C

想问下宾语从句that省略是绝对性错误还是相对性错误？

蟹黄味蚕豆

绝对错误 但是announce 还有几个词语（没出现过）是例外 当成固定搭配记住就好了

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感谢！！！