Final answer:
The two approaches that advertising agencies used during the Great Depression were selling optimism and risk and selling dreams and hope.
Step-by-step explanation:
The two approaches that advertising agencies felt ads had to use in response to the demands of their clients during the Great Depression were selling optimism and risk, and selling dreams and hope.
One approach focused on selling optimism and risk, appealing to people's hopes and aspirations. Marketers sought to convince potential customers that their products would bring prosperity and opportunity, even during difficult times.
The other approach focused on selling dreams and hope. Advertisers aimed to sell the idea that their merchandise would not only fulfill material desires but also bring happiness and a better future.