Correct option is C
The correct substitution of the highlighted segment is “too good to be real.”
Error identification: The phrase "too good and real" is incorrect as it fails to convey the intended meaning. The idiomatic expression "too good to be true" is more appropriate, but "real" is retained to fit the context.
Grammatical Rule used: The phrase "too good to be real" suggests something is so excellent that it seems unbelievable.
Corrected sentence: She is too good to be real.