Answer: Option (A). A petition by two-thirds (34 of the 50) of the states
Explanation : A constitutional convention is the coming together of the state legislature for the purpose of writing a new constitution or amending an existing constitution. Members of a constitutional convention which are sometimes referred to as "delegates" to a constitutional convention are often elected by popular vote. Two-thirds (currently 34) of the state legislatures condition must be met in other for a constitutional convention to be called.