How did the election of 1868 affect the process of reconstruction?

Which is not a characteristic of a multiparty system?

Plz ive been stuck on this question forever. in 1753 george washington was sent on a mission to a. build a fort at the point where the allegheny and monongahela rivers form the ohio river. b. attack the french at fort duquesne. c. attack the french at fort neccessity. d. deliver a message to the french demanding that they leave the ohio river.

Which best expresses the radical republican philosophy of reconstruction?