Ratifying an amendment takes of state legislatures or both houses of congress, whereas proposing an amendment requires only of state legislatures or both houses of congress.
a. one-third . . two-thirds
b. three-fourths . . one-third
c. two-thirds . . three-fourths
d. three-fourths . . two-thirds

d. three-fourths . . . two-thirds

Both the Congress and state legislature can propose an amendment: The Senate and the House of the U.S. Congress can propose it by at least two-thirds of votes in favor, and the state legislature also can do it by calling a National Convention first, in which two-thirds of votes has to be on favor of proposing it.

After this, the amendment has to be ratified; depending on who proposed it, it is only ratified with at least three-fourths of the state legislatures or both houses of Congress.

well it depends i think people around the world are coming around to gay marriage. but if you are talking abortion then wow, so much to talk about. such as men thinking they have the right to choose if women can, the fact there are health concerns if the women can't get one, and many more arguments to discuss. so i would definitely say abortion would be a much more interesting topic.