Why were the nation's founders surprised by the emergence of a two-party political system in the United States?

A. There was widespread agreement as to the character of the new nation and the role of the central government.
B. Nothing in the Constitution called for the creation of political parties.
C. George Washington's administration was exceedingly united in its approach to national policy.
D. The United States appeared to be too large and diverse to encourage the formation of political parties.