Which of the following are reasons the grain supply increased during the High Middle Ages? Select the two correct answers.
(1 point)
Responses
slash-and-burn agriculture
slash-and-burn agriculture
the use of oxen to pull plows
the use of oxen to pull plows
the use of wooden hand tools
the use of wooden hand tools
the use of the iron plow
the use of the iron plow
the use of the three-field system
the use of oxen to pull plows
the use of the iron plow