Seem / I heard that / it is said that

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Apr 16th 2010 19:21 pronoun-selection phrase-nuance
(A) "Betty seems depressed. What's wrong with her?"
"Well, she has difficulty doing her homework. She seems to have taken it for granted that his boyfriend would help her with it."

(B) "Betty seems depressed. What's wrong with her?"
"Well, she has difficulty doing her homework. I heard that she took it for granted that his boyfriend would help her with it."

(C) "Betty seems depressed. What's wrong with her?"
"Well, she has difficulty doing her homework. It is said that she took it for granted that his boyfriend would help her with it."


I suppose (A) and (B) are correct, but (C) is unnatural because of the phrase "it is said that", which I supposed to be used to refer to what is generally believed, not believed in specific communities or people.


Is this supposition right?


Thank you in advance!!!


[Memo: phrase-selection, phrase-nuance]