which of the following is the part of the ratification prossess in the u.s constitution that has never been used

A) congress calls for national conventional convention
B)congress votes by two thirds majority votes to purpose an amendment
C) three fouths of the states convention ratifiy an ammendment**
D)three fouths of the states legislatures ratify an ammendment

To determine which of the options has never been used as part of the ratification process in the U.S Constitution, we can analyze each option:

A) Congress calls for a national conventional convention: This process has been used in the past. According to Article V of the U.S Constitution, Congress can propose amendments to the Constitution by either a two-thirds majority vote in both the House of Representatives and the Senate or by calling for a national convention when requested by two-thirds of the state legislatures.

B) Congress votes by two-thirds majority votes to propose an amendment: This process has also been used in the past. Congress can propose amendments by a two-thirds majority vote in both the House of Representatives and the Senate.

C) Three-fourths of the states' conventions ratify an amendment: This process has been used before, such as in the case of the ratification of the 21st Amendment, which repealed the 18th Amendment (Prohibition).

D) Three-fourths of the states' legislatures ratify an amendment: This process, too, has been used in the past. Most amendments have been ratified by three-fourths of the states' legislatures.

Therefore, the option that has never been used as part of the ratification process in the U.S Constitution is C) three-fourths of the states' conventions ratify an amendment.

Read carefully:

https://www.washingtonpost.com/opinions/there-are-four-not-two-ways-to-amend-the-constitution/2016/08/18/058afcf2-6420-11e6-b4d8-33e931b5a26d_story.html