Which one of the following is a correct food chain?

• A
  Grasshopper $\rightarrow$ Grass $\rightarrow$ Snake $\rightarrow$ Frog $\rightarrow$ Eagle
• B
  Grass $\rightarrow$ Grasshopper $\rightarrow$ Frog $\rightarrow$ Snake $\rightarrow$ Eagle
• C
  Eagle $\rightarrow$ Snake $\rightarrow$ Grasshopper $\rightarrow$ Grass $\rightarrow$ Frog
• D
  Frog $\rightarrow$ Snake $\rightarrow$ Eagle $\rightarrow$ Grasshopper $\rightarrow$ Grass