How did many manufacturers in the 1920s improve efficiency to meet increasing consumer demand? They raised prices to reduce consumer demand, allowing time to meet production needs. They resisted changing production and sales techniques so workers would not need retraining. They offered a smaller variety of goods to focus on producing only a few products. They adopted mass production manufacturing techniques developed by Henry Ford.

Option: They adopted mass production manufacturing techniques developed by Henry Ford.

Explanation:

Many manufacturers in the 1920s improve efficiency to meet consumer demands by adopting the mass production technique. During the 1920s, it was the first time when Americans people introduced to new appliances. The requirements for new gadgets, automobiles, the washing machine, the radio, instant camera, jukebox, television, and refrigerator increased. Many of the manufacturers adopted the assembly lines for production. The assembly lines helped in producing the finished product in a short period.

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mass production/ assembly line production