Prior to Taylor and Brown's (1988) important article, it had always been assumed that is a cornerstone of good mental health. a) being realistic. b) being open and communicative with others.
c) a high sense of self-worth.
d) feeling fully in control.
e) a supportive family of origin.

c) a high sense of self-worth.

Explanation:

The mental health of an individual is the state at which the individual mind functions. The emotions expressed is dependent on it. Previously, it was greatly assumed to be tied to the feeling of self worth which the individual feels but Taylor and Brown was able to prove in their research article that, those feeling is not objective feeling but rather a positive biased one which influenced the psychology of the individual feeling the good. These positive  illusions promote psychological well-being.

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