What do lung cancer and emphysema have in common?
O
A. a. They both occur among almost everybody as
they get older.
B. b. They are both caused by the buildup of carbon
dioxide in the lungs,
O
c. c. They are both normal side effects of
respiration
O
D. d. They are both caused by smoking:

It should be D, They are both caused by smoking

Explanation:

Smoking can be dangerous for lungs. When you inhale the smoke from the outside it builds up in the lung and after sometime it can cause lung cancer, emphysema is also a very common cause from smoking.

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