How did captain John Smiths leadership save the settlement at Jamestown?

A. He led the settlers in finding large quantities of gold and silver
B. He threatened to send any settler who refused to work away from Jamestown
C.he encouraged the settlers to begin a mutiny against the Virginia company
D. He taught the settlers how to grow tobacco and manage large plots of land.

D. He taught the settlers how to grow tobacco and manage large plots of land.