Pls pls help for this question :What word should go where the question mark is ?

Step 3: A national constitutional convention called by 2/3 of the state legislatures

Explanation: Ratified by three-fourths of the state legislatures

c. have a great day ~ma.tiah

(202 bc - 220 ad) dynasty started by lui bang; a great and long-lasting rule, it discarded the harsh policies of the qin dynasty and adopted confucian principles; han rulers chose officials who passed the civil service exams rather than birth; it was a time of prosperity