Which of the following is not true of the office of the vice president since the 1920s?

The office of the vice president grew in prominence over time, and presidents increasingly assigned vice presidents important duties. For example, vice presidents served significant roles in the 1950s and 1960s, so it is not true that they did not serve important purposes. The best answer is D, “Vice presidents in the 1950s and 1960s did not serve important purposes in their respective administrations.”

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