Although the constitution was ratified by the required number of states, it was important that also ratified the constitution because
a. virginia . . both george washington and james madison were part of its convention
b. new york and massachusetts . . it was important to demonstrate that the federalists had won the ratification debate
c. new york and virginia . . the new government would need the support of large states to be accepted by the country
d. north carolina and georgia . . it was so necessary to win over the support of southern farmers and landowners

C. New York and Virginia . . . the new government would need the support of large states to be accepted by the country

Explanation:

In the first 10 months of its creation the constitution was ratified by the 9 states necessary to be passed, the other states would need to accept it since it was already accepted by the majority of the states, but New York and Virginia were still debating it, the Union needed them to ratify it, because in case of failure to ratify they could be expelled from the union and they were two largely populated, wealthy states that were needed to strengthen the Union.