B the most well known chemicals inside cigarettes would includen carbon monoxide and tar.
Answer:
the very cause of bronchiectasis is tuberculosis ..
<span>D is the correct answer. Controllable risk factors are factors you have control over, for example environmental or behavioural. These are such things as sexual behaviour and smoking. Her age and heredity are examples of uncontrollable risk factors, as a person cannot determine these.</span>
