Which of the following are procedures by which the u. s. constitution can be formally changed? select all that apply. (3 points) congress proposes an amendment by a two-thirds vote, and state legislatures ratify the amendment by a three-fourths vote. a national convention proposes an amendment requested by three-fourths of states, and congress ratifies the amendment by a two-thirds vote. congress proposes an amendment by a two-thirds vote, and a state convention ratifies the amendment by a three-fourths vote. a national convention proposes an amendment requested by three-fourths of states, and state legislatures ratify the amendment by a three-fourths vote. 2. which of the following amendments was proposed but not ratified? (1 point) an amendment prohibiting the manufacturing, sale, and transportation of alcohol an amendment guaranteeing the right to vote for those 18 years or older an amendment abolishing poll taxes that were required for voting an amendment specifically granting equal rights to women 3. which of the following is an example of an informal change to the constitution by legislative action? (1 point) executive agreement party nominating convention creation of a federal court system reversal of a supreme court ruling 4. which of the following methods of informal change has most impacted the electoral college? (1 point) legislation customs political parties judicial action 5. why was an amendment process included in the u. s. constitution? (1 point) to preserve popular sovereignty and limited government to allow for the changing needs of society to check the power of the executive branch to ensure domestic tranquility among the states