Is to unite the audience around a common goal.
The answer is letter A - Rhinostenosis and nasomental. Rhinostenosis is narrowing or obliteration of the nasal airway. Obviously we mainly breathe throw our nose. If it is clogged or being narrowed then we naturally will be having a hard time breathing. Rhinostenosis is a breathing condition.
During exercise, we undergo respiration. Therefore, we need oxygen and release carbon dioxide and water as waste products. When exercise become vigorous, we only run on anaerobic respiration with little oxygen, then lactic acid becomes a waste product instead of carbon dioxide and water. This occurs due to incomplete breakdown of glucose.
Best answer is C. lactic acid.