In the recent past, the process for choosing a chairperson for a committee has changed from a seniority system. which of the following best describes the process that is most likely today? a. voting by the house of representatives only c. the person that proposed the creation of the committee is the chairperson b. the chairperson is chosen by the majority party d. the president makes the final decision about the chairperson of a committee

Based on your question, I'm going to assume we're talking about committees of the US House of Representatives.  The best answer there is A, that the full House votes to ratify committee members and their chairpersons.  For standing committees in the House, the Democratic Caucus and Republican Conference each recommend members to serve on a committee.  The majority party recommends the Chair of the committee, and the minority party recommends their party's Ranking Member of the committee.  Then the full House of Representatives is asked to approve the nominations.

The amendment process.