A result of the Battle of Concord was that British troops were able to maintain control of the colonies.
colonists showed British troops that they were prepared.
neither British troops nor colonial minutemen gained an advantage.
colonists showed British troops that they were unprepared.

Colonists showed British troops that they were prepared

Explanation:

The battle of Concord ended in British troops retreating without completing their mission. The colonists had been ready to meet them when they came.

c. as a force against soviet invasion of afghanistan

the answer is richard nixion