How Did the Problem of Food Shortages Change in the Eighteenth

How did the problem of food shortages change in the eighteenth century?

A) Increased road and canal building permitted food to be more easily transported to regions with local crop failure and famine.
B) Advances in agricultural methods produced abundant food supplies and eradicated famine.
C) A return to the open-field system evened out food distribution and helped to prevent food shortages.
D) The European colonies became an alternate source for food that could be used to overcome poor harvests.