A SC question

ycning

A question from NewOriental's book. The book picks (A) as the answer while I think the (D) is more like the right one. What do you think?

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Although the manager agreed to a more flexible work schedule, [U]he said that it must be posted on the bulletin board so that both management and labor will know what everyone is[/U] assigned to do.
(A) he said that it must be posted on the bulletin board so that both management and labor will know what everyone is
(B) he said it had to be posted on the bulletin board so that both management and labor knows what everyone is
(C) he siad that they would have to post the assignments on the bulletin board so that management and labor knew what everyone was
(D) he said that the schedule would have to be posted on the bulletin board so that both management and labor would know what everyone was
(E) saying that the schedule had to be posted on the bulletin board so that both management and labor would know what everyone had been

linsonstudy

我查了新东方的书，没有这题啊！  请注明书名和题号。
我也觉得好像是D对。

ycning

刘振民的书 E4-20

atongmu

have to的意思和must不一样。这种语气不能随便改的说。