Which of the Following Procedures Are Required When Attempting to Amend

Which of the following procedures are required when attempting to amend the United States Constitution?

A) A majority of American voters must pass a referendum which then goes to Congress for approval.
B) A majority of American voters in a majority of the states must pass a referendum which then goes to Congress for approval.
C) The Electoral College must pass a resolution which then goes to Congress for approval.
D) Three-quarters of the states must ratify a resolution already approved by Congress.
E) A majority of American voters must approve a resolution already passed by Congress.