Here's a problem to solve: What will most likely happen to this food chain if a farmer decides to dust a wheat crop with an insecticide? wheat -> insects -> sparrows -> hawks

Among the 4 following options, which is the correct answer?

- A: The grass would become greener.
 
- B: More birds would move into the fields.
 
- C: The hawks would eat more of the grass.
 
- D: There would be fewer sparrows seen in the fields.
 