The congress . . shall propose amendments to this constitution, or . . shall call a convention for proposing amendments, which, in either case, shall be valid to all intents and purposes, as part of this constitution, when ratified by the legislatures of three fourths of the several states. based on the excerpt, which of the following best describes the process of amending the constitution? the process of amending the constitution is difficult, and it happens rarely. the process of amending the constitution is easy, and it happens often. the process of amending the constitution is difficult, but it happens often. the process of amending the constitution is easy, but it happens rarely.