At the beginning of the process, a bill

Proposed is the correct answer.

Explanation:

In the process of a bill becoming a law, Its proposal is the first step. first, the idea of the bill is developed and is written in text. A congress member is required to introduce the bill in Congress by becoming bills sponsor. The representatives sponsor the bills which are important for them, and they try to gain support for the bill. If there are two or more than two sponsors of the bill they are known as co-sponsors.

i think the answer is a and i hope this ; ))