Between 1640 and 1660, the Nature of European Immigration into North

Between 1640 and 1660, the nature of European immigration into North America changed, for reasons including:

A) The lucrative tobacco industry lured an increasing number of immigrants to Virginia.
B) Declining deaths due to epidemics curtailed wars in the northeastern part of North America.
C) Laws regarding indentured servitude were relaxed.
D) Relatively peaceful conditions in England deterred English citizens from emigrating.