Self-study
I'm thinking that maybe C is wrong because the mergers does no good to the market share, and the newly merged companies still have to gain market share by purchasing competitors. However, D indicates that since some producers have been squeezed out of the market, there are some space for new companies which can gain their market share through more aggressive marketting. That's why D is the correct answer. i'm not sure if my explaination is correct, please help.
Admin note: edited title; please use the format of "PT#.S#.Q# - [brief description]"
I think the main point is "the self-knowledge that people are not reliable authorities about their real wants is not the easiest kind of knowledge to acquire", which can be outlined as "the self-knowledge is not the easiest kind of knowledge to acquire". It seems that E just contains the part of "the self-knowledge", which is uncomplete. I don't understand. Is it because of the word "necessarily" that makes it a right answer?
#help (Added by Admin)