The most accurate answer to why the Americans were more successful at the Battle of Concord compared to the Battle of Lexington is C: the Americans used guerrilla style fighting tactics.
At Lexington, the American forces were caught off guard and were outnumbered, leading to a quick defeat. However, at Concord, the American militia utilized more effective tactics, including hiding behind trees and walls, to engage the British troops. This strategy allowed them to inflict greater casualties and ultimately force the British to retreat.
The other options do not accurately capture the reasons for the difference in outcomes between the two battles.