Question

read the following excerpt from federalist #44 by james madison. had every state a right to regulate the value of its coin, there might be as many different currencies as states, and thus the trade among them would be impeded; unexpected changes in its value might be made, and thus the citizens of other states be injured, and animosities be kindled among the states themselves. the subjects of foreign powers might suffer from the same cause, and hence the union be discredited and embroiled by the indiscretion of a single member. according to madison, ratifying the constitution would improve the economy by allowing each state to have its own currency and trade laws. preventing trade by individual states with other countries. allowing only gold to be used as currency for trade purposes. preventing individual states from having their own currencies.

Explanation:

Madison argues that if each state regulated its coin - value, there could be multiple currencies, impeding trade. So, preventing individual states from having their own currencies would improve the economy by facilitating trade.

Answer:

preventing individual states from having their own currencies.