Answer:
The correct answer would be -provide detailed information about the research and drug and let the man decide if he wanted to withdraw from the research or take new drug.
Step-by-step explanation:
In this type of case where there is a drug that is in on going study or in clinic trail which is showing promising result, investigator should provide the client or subject a comprehensive account of the drug with is pro and cons and side effects.
He should discuss about the both currently available drug in market and ongoing research drug and let the man decide whether he want to be part of the research or withdraw from the research.