Answer: D. By drawing a parallel between the rise of the "Extrovert Ideal" to the life of Dale Carnegie.
Explanation:
In "Quiet: The Power of Introverts in a World That Can’t Stop Talking" (2012), Susan Cain illustrates the rise of the "Extrovert Ideal" by comparing it to the life of Dale Carnegie, as described in his How to Win Friends and Influence People (1936).
According to Cain, Carnegie´s change from a farm boy to a sales man and then to a public speaking icon, is a good example of the move from a Culture of Character, prevalent until the 1920s, to a Culture of Personality, which is externally focussed as it gives more importance to appearances than to actions.
