Which of the following options represents the correct sequence of animals based on the evolution of the heart?

• A
  Shark $\rightarrow$ Salamander $\rightarrow$ Chameleon $\rightarrow$ Crocodile
• B
  Salamander $\rightarrow$ Shark $\rightarrow$ Chameleon $\rightarrow$ Crocodile
• C
  Chameleon $\rightarrow$ Salamander $\rightarrow$ Shark $\rightarrow$ Crocodile
• D
  Chameleon $\rightarrow$ Salamander $\rightarrow$ Crocodile $\rightarrow$ Shark