Which of the following is a true statement about the difference between feudal serfs and indentured servants? a. serfs were not allowed to physically leave the land, while indentured servants could come and go as they . b. serfs worked the land for life, while an indentured servant worked it only for a contracted period of about 4-7 years. c. serfs were not allowed to have children, while indentured servants were encouraged to have children. d. serfs were much harder workers than indentured servants.