Answer:
A. Members must belong to the Republican or Democratic Party is the correct answer.
Step-by-step explanation:
Congress is the legislative branch of US government. It has two parts: the US House of Representatives and U.S Senate.Each of the states have two senators and one US representative and number of representatives from a state depends on the population of the state. There are 435 US representatives and 100 US senators. Its members can be elected from any of the parties that contest elections, it is not mandatory for the members to be from democratic or republican party.