PREP-1-135 破解版的分析不太理解，多谢指点！

135.
            (31742-!-item-!-188;#058&004710)

At one time, the majestic American chestnut was so prevalent that it was said a squirrel could jump from tree to tree without once touching the ground between New York
            State and Georgia[BryanZhou1] .

(A) so prevalent that it was said a squirrel could

(B) so prevalent that a squirrel was said that it could

(C) so prevalent for a squirrel to be said to be able to

(D) prevalent enough that it was said a squirrel could

(E) prevalent enough for a squirrel to be said to be able to

announce(that), say(that),后面的都可以省略。indicate后面的that不可以

请问这个语法点能帮忙总结一下么？多谢多谢。

记得关于从句that的省略有这样的总结：宾语从句，先行词做主语的定语从句中that不能省略。不知道这里announce(that), say(that), indicate that中哪种情况啊？

帮顶一下