The analyst argues
1. Small businesses complain coupons reduce revenue - customers pay less
2. Companies using coupons have been substantial growth in over all sales and there is a strong correlation between coupons downloads and monthly revenue
3. Conclusion : Therefor coupons increase profits rather than reduce them
We can observed that analyst jumps from increased sale or revenue to increased profits, whihc is a mistake.
Generally, revenue = total money collected ( price * quantity)
and profit = amount left after all cost paid ( Revenue - cost)
so for business, the cost of offering coupons includes actual discount i.e., price reduction and cost of managing the coupon program.
If increase in sales revenue is less than cost of discounts given, the business could have higher revenue but still lower profit than if they hadn't offered the coupons.
Lets take an example, a business sells 100 items at 10 dollars , therefore revenue = 1000 dollars
if they have offered 2 dollar coupon and sales jump to 200 items , then revenue is 200 * (10-2) = 1600
here we can observe gain is 600 dollars in revenue but the cost of the 200 discounts was 200 * 2 = 400. They might still be profitable overall but the increase in profit is only 200.
However , the critical point is that overall operational cost might increase with larger volume of sales making the jump from revenue to profit uncertain. The analyst fails to consider the cost of discount itself and other operating costs.
lets check the options now.
option A : This addresses the correlation issue but its not primary , most obvious flaw in jump from revenue to profit.
option B : This is a common flaw in coupon arguments but it doesn't directly challenge the analyst jump from revenue growth to profit growth
option C : This perfectly matches our flaw. The discount is a cost. if cost of the discount out weights the extra revenue generated , profits will decrease even if revenue goes up.
option D : This states that companies have been substantial growth in overall sales, implying a before and after comparison , so this is unlikely to be main flaw
option E : This address a potenial sampling bias, but core evidence focuses on companies that did use coupons. Again, the most direct flaw is leap from revenue to profit
Therefore correct answer is C.