All of the Following Statements Are True of the Three-Field

Multiple Choice

All of the following statements are true of the three-field system except

A) ​only two-thirds of the land was used in a given year
B) ​it increased the amount of land farmed
C) ​diversification of crops added more vegetable protein
D) ​was mostly used in Southern Europe
E) ​left one-third of the land fallow each year