The "Starving Time" in Jamestown During the Winter of 1609-1610

The "starving time" in Jamestown during the winter of 1609-1610 was partly the result of

A) an influx of rats from settlers' ships that ate much of the stored grains.
B) a barricade set up by the Indians, which kept the colonists from hunting and cultivating food inland.
C) the extermination of the Indians who used to grow crops.
D) the sinking of the colonists' supply ship in the Atlantic.
E) a drought that led to crop failures.