Answer:
b. Republican , Democrats
Step-by-step explanation:
The original two-party system in the U.S was made up of the Republicans and Democrats
The Republican Party was founded on 20th March 1854, Ripon, Wisconsin, United States. They support lower taxes, free-market capitalism, gun rights, elaborate military budgets, zero tolerance on abortion, etc.
The Democratic Party was founded on 8th January 1828 and they are generally conservatives and believe in decreased military spending, higher taxes for the wealthy, etc.