What treatment might an old time doctor have tried to accomplish with leeches?\nOptions:\n- heart transplant\n- distance himself\n- perform surgery\n- study medicine\n- let blood
Reason slowly and give your answer.
let blood
Let blood is the withdrawal of blood from a patient to prevent or cure illness and disease.

Let blood is the treatment an old-time doctor might have tried to accomplish with leeches.

.

The answer: let blood