Answer: to meet the demands of different groups to be enfranchised
Step-by-step explanation:
Even though the United States was founded to be a free country, this freedom was not a reality to a lot of groups such as Black people and women, both of whom found that they could not vote in the country they called home.
The 15th and 24th Amendments aimed to remove this disenfranchisement from Black Americans by constitutionally enforcing their rights to vote and for women, the 19th Amendment took care of that. The 26th Amendment was passed to end the disenfranchisement of people within the age group of 18 - 21 who were eligible for military service but were ineligible to vote.