Which Depression-era advertising slogan, first introduced in 1933, dramatically increased sales by emphasizing its product's ability to provide cheap nutrition during economic hardship?

During the Great Depression (1929-1939), companies had to radically rethink their advertising approaches as consumers had significantly less purchasing power. Some of the most enduring advertising slogans and campaigns in history emerged during this challenging economic period, as brands sought to connect with cash-strapped consumers through messages of reliability, value, and comfort. Test your knowledge about one particularly famous slogan that revolutionized its product category during this difficult time.

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"A Mars a day helps you work, rest and play" (Mars Bar)
"When you're out of Schlitz, you're out of beer" (Schlitz Beer)
"Campbell's Soups: Mmm Mmm Good" (Campbell's)
"Look for the Gerber Baby" (Gerber Baby Foods)