Final answer:
The bill now goes to the conference committee, which reconciles the differences between the versions passed in the House and Senate. Only after the conference committee's agreement can the bill progress to the president for signature or veto. A bill that has been approved in both the House and Senate in different forms goes to a conference committee to reconcile the differences. The correct answer is conference committee.
Step-by-step explanation:
When a bill is passed in both the House and the Senate but in slightly different versions, a conference committee is formed to reconcile the differences and create a final version of the bill that both chambers can accept.
The conference committee is made up of members from both chambers who negotiate a reconciliation without making any amendments. Only after the conference committee has reached an agreement can the bill progress to the president's desk for signature or veto.