Advertisers typically use associated images rather than rational argument to pitch a health-oriented or dietary product, working on the average person's insecurities about physical appeal and strengthening our society's growing obsession with youth. As a result, most consumers choose their health purchases on the basis of unconscious and false expectations. It is no wonder that so many Americans today feel disappointed with the reality of their lives and unfulfilled as human beings.

The reader's ability to assess the reasonableness of the writer's claim above would be significantly enhanced by knowledge of all the following EXCEPT:

A. the methods by which false expectations are raised and manipulated by advertising for health-oriented or dietary products
B. the ways in which decisions are made about what type of advertising is used to market a specific product
C. the extent to which the average consumer is actually obsessed with retaining a youthful appearance
D. the depth of personal disappointment and lack of individual fulfillment to be found in most American lives today
E. the processes by which most consumers actually make a decision to buy one product rather than a competing one

I found this one very confusing , any experts help is appreciated.