The Dramatic Increase in Yields Associated with the Second Agricultural

The dramatic increase in yields associated with the second agricultural revolution coincided with

A) a commercial market for food created by the growing urban labour force.
B) the advent of communism and the emergence of communal farming systems.
C) the arrival of crops (potatoes, tomatoes, peppers, chocolate) from the New World.
D) the introduction of hybrid seeds and GMOs (genetically modified organisms) .
E) the large influx of migrants from peripheral to core countries.