Because it's a free country
Congress passed the Selective Service Act
If you mean like using a credit card then my response might help. So when you to an atm you can transfer paper money into your credit card by answering the questions on the screen and you can also take a loan from the machine of paper money or money in your card soon resulting in returning the money that you borrowed. If this is a question about math then credit is a positive term. So if a question asks about a persons money then you know that the money they have is positive. I hope I helped although this is labeled as a history question. Good luck.
A source created after the event is called a secondary source
13th: ended slavery in the united states
14th: extended protection under the law to all u.s citizens
15th: extended the right to vote to African american males.
19th: extended the right to vote for women
The way that amendments have affected Americans’ participation in government is by guaranteeing their rights and freedoms 18-year-old given the right to vote, nineteenth which gives African-American males the right to vote