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) colonists being kept barricaded in their palisade by local Indians.
B) the extermination of the Indians who used to grow crops.
C) an influx of rats from settlers' ships that ate much of the stored grains.
D) a drought that led to crop failures.
E) the sinking of the colonists' supply ship in the Atlantic.