Question: A student notices dogs have more fleas in the summer than in the winter. Based on these observations, which is the most logical question for the student to investigate?

  Options: 
 A. How does wind affect the amount of fleas on dogs?
 B. How does diet affect the amount of fleas on dogs?
 C. How does rain affect the amount of fleas on dogs?
 D. How does temperature affect the amount of fleas on dogs?
Answer: D