Which of the following person had extended the personality typology proposed by Friedman and Rosenman by suggesting a Type C Personality?

Morris

Friedman and Rosenman classified individuals into Type-A and Type-B personalities. They were trying to identify psychosocial risk factors when they discovered these types. This typology of Friedman and Rosenman has been further extended. Morris has suggested a Type-C personality, which is prone to cancer and individuals characterised by this personality are cooperative, unassertive and patient, who suppress their negative emotions (like anger), and show compliance to authority.