Answer :
The correct answer is D) the British did not support Loyalist militias adequately.
The event that contributed to the defeat of British troops in the South was that the British did not support Loyalist militias adequately.
The British troops did not have enough support of the Loyalist in the South because the English did not prepare and support back the Loyalist militias. he British considered that they already had overwhelming support in the South and did not pay much attention in making sure their Loyalist had everything they needed.