Let's think step by step! Cells do not include
Options:
- (A) harmful substances
- (B) sulfate particles
- (C) the smallest agent of disease
- (D) direct damage to the lungs
- (E) sub-units of species
- (F) Inches or fractions of inches.
- (G) Something with a head, thorax, and abdomen
- (H) Direct sunlight.
The thinking starts now:
Viruses are not cells. Viruses Viruses are the smallest agents of disease. The smallest agents of disease are not cells. The final answer: (C).