Which group has the authority to ask for a convention to propose new amendments?

The correct answer identifies that two-thirds of the states can, through their legislatures or by conventions, call for a convention to propose new amendments to the Constitution. This process is outlined in Article V of the Constitution, which provides a mechanism for amending the Constitution. Specifically, amendments can be proposed either by two-thirds of both Houses of Congress or by a convention called for by two-thirds of the state legislatures.

The option stating that 3/4 of the states has the authority reflects a misunderstanding, as 3/4 of the states is required for ratification of proposed amendments, rather than for calling the convention. The option indicating that Congress alone can initiate this process overlooks the alternative method provided in the Constitution that allows states to initiate amendments. The President does not have any role in calling for a convention or proposing amendments, as this power is specifically designated to the states and Congress.