The correct answer to this open question is the following.
At a dinner party, you hear someone make the following statement: "Religion doesn't do any good for anyone. Religious people are no healthier, and die at the same ages as do nonreligious people." According to the evidence given in the text, you should reply: "You are quite wrong. The research evidence shows that religious people are healthier and live longer."
This is the right way to answer to reply to a person who says something that is not based on research. In this case, the other person is expressing an opinion, his own opinion. That is why the correct form of an answer to that opinion is to mention the facts of the research in a decent and polite way.