The coastal-route theory suggests that people may have first arrived in the americas by crossing from greenland or iceland in large ships and traveling south along the atlantic coast. the land bridge but spreading south along the pacific coast instead of moving inland. the open pacific on a raft and reaching the coast of south america. the arctic waters by boat and traveling south along the pacific coast.

Which one of the following was not a reason for the emergence of the single-family peasant farm as the basic unit of agricultural production in the early middle ages? select one: a. the mounted soldier made warfare expensive, so many warriors became full-time farmers. b. the declining birthrate made it necessary for entire families to work in agricultural production. c. horses made it easier, although more expensive, for farmers to support themselves. d. it was more economically feasible for landowners to rent their land to farmers. e. villa owners could no longer purchase slaves.