Answer:
Whenever the other house of Congress significantly alters a bill, a D: Conference committee must be formed to reconcile the differences between the House and Senate versions of the bill.
Step-by-step explanation:
When the House and the Senate pass different versions of a bill, or a house of Congress significantly alters the version of a bill passed by the other house, a Conference Committee is convened. The main role of this committee is to be a temporary panel in which representatives of both chambers work together to reconcile their difference over a bill, in order to reach a compromise.
If a compromise is reached, the "managers" (conferees) prepare a conference report and then they send it to each chamber. Once the conference report is approved by the chambers, the bill is sent to the President for signature so that it can become a law.