The answer is C. Change in senses.
Second-hand smoking is also known as passive smoking. Those exposed to second hand smoking have increased risk to Chronic Obstructive Pulmonary disease (COPD), Coronary Heart diseases, Stroke, and Lung cancer.
Smoke can linger in the air up to 5 hours. So even if you smoke alone for now, you can still expose the other people to the toxic chemicals.
