Which piece of legislation increased the number of demographics eligible to vote by decreasing the required voting age to 18

The Twenty-sixth Amendment

Explanation:

The Twenty-sixth Amendment to the Constitution allowed all citizens eighteen years of age or older to vote. This amendment decrease the voting age and in doing so, increased the number of demographics eligible to vote. The amendment was born out of student movements. Students argued that, if they were old enough to be drafted into a war, they should also be old enough to make policy choices and have a voice in government.

i think it’s will be a yes