It can be inferred from the passage that Mrs. Fairfax: 

A. Does not believe that Mr. Rochester’s actions with Miss Eyre are characteristic of him.
B. Does not believe that Miss Eyre’s character is good enough for Mr. Rochester.
C. Does not believe that Miss Eyre understands how wealthy and important Mr. Rochester is.
D. Does not believe that Miss Eyre is being honest about her feelings towards Mr. Rochester.