I think the correct choice is A.
You are right in saying "most" and "some" show different degree of certainty. But, in this question, "some" and "most" don't refer to the same group of people. "Some" only refers to "good comedians who have had miserably unhappy childhoods". But how about the good comedians who haven't had miserably unhappy childhoods? They can still be happy adults.
Another approach to this problem is to pay attention to "good" and "best". If he is a best comedian, he must be a good comedian, but not vice versa. The last sentence only states that "some good comedians who have had miserably unhappy childhoods are happy adults", we cannot conclude from this statement that "some BEST comedians who have had miserably unhappy childhoods are happy adults".
A is clearly the choice because the proportion of the best comedians who had unhappy childhood is 100 percent. Nothing can be greater than that.
|