Read the following conversation and answer the question.

W: Did you go see the doctor about your cough?

M: The doctor said if I keep smoking it will increase my chance of having a heart attack or lung disease. And I am thinking about quitting smoking as the problems seem to be quite serious.

Question: What do we know about the man? 

- He has had a heart attack because of smoking:

- He has serious lung disease.

- He is coughing because of too much smoking.


He is coughing because of too much smoking.