Answer:
A. Congress debates the bill and may make amendments.
Step-by-step explanation:
Making a bill into a law is quite a long process. The obstacles it pass through ensures that the bill has been well-scrutinized before turning it into a law.
Once the bill has been sent to the Congress (House of Representatives and the Senate), a debate occurs. Changes to the law are also being made here before it can be passed towards the President. It's important that the two houses of the Congress approve of the bill in order to proceed to the next step.