(Consider This) According to the Piece "Wannamaker's Lament," How Have

(Consider This) According to the piece "Wannamaker's Lament," how have firms responded to the evidence that most advertising campaigns have little impact on sales?

A) Firms have substantially cut their advertising budgets to focus more on product quality.
B) Firms have substantially increased their advertising budgets in order to hit the spending threshold necessary to affect sales.
C) Firms have substantially cut their advertising budgets to focus more on new product development.
D) Firms have conducted a lot of simple experiments to determine what might increase sales.