A. Being assigned to noncombat roles
The communal system that John Smith abolished at Jamestown that saved him from destruction is common-store system.
The common-store system was a system where each person was required to place the food of his labor in a common storehouse.
In the common-store system, the food taken by the community was then distributed equally. This was bad for the colonists as many of the people decided not to work since they knew they will still get the proceeds from the labor of other people. This led to food shortages. The system was eventually stopped by John Smith.
In conclusion, the correct option is the common-store system.
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