Why becoming an adult at the age of 18? ?

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Explanation:

Before the passage of the 26th Amendment in 1971, 21 was the minimum voting age in most states—and thus served as the age of adulthood in most areas of law. Congress lowered the nationwide voting age to 18 as a response to unrest and passionate debate about the Vietnam War.

you do this because a real teammate puts the team first

because they were not just any seashells they were sally's seashells