Which of the Following Occurred Because Most Arable Land Was

Which of the following occurred because most arable land was already under cultivation in central and eastern Europe by 1600?

A) Large landowners divided their holdings among their tenants.
B) Magnates in these areas imitated the Dutch by reclaiming land from lakes and marshes.
C) Many landowners drove peasant small-holders off their land and into serfdom.
D) Harvest yields reached new heights and were profitable.
E) For many years, there was no longer a need for innovation in farming practices in this area.