When the house and the senate pass different versions of the same bill, a conference committee is appointed to resolve differences. the house bill is changed to conform with the senate bill. the senate bill is changed to conform with the house bill. a joint committee is appointed to resolve differences?

When the House and the Senate pass different versions of the same bill a conference committee is appointed to resolve differences
The conference committee is specifically created by the Congress in order to resolve the disagreement in discussing a bill. The members of the conference committee is usually consist of several senior members of the house