Which of the Following Is Placed in the Correct Order $\rightarrow$

Which of the following is placed in the correct order of increasing complexity?

A) circulatory system $\rightarrow$ cardiac muscle $\rightarrow$ heart $\rightarrow$ cardiac cell
B) circulatory system $\rightarrow$ heart $\rightarrow$ cardiac muscle $\rightarrow$ cardiac cell
C) cardiac cell $\rightarrow$ heart $\rightarrow$ cardiac muscle $\rightarrow$ circulatory system
D) cardiac cell $\rightarrow$ cardiac muscle $\rightarrow$ heart $\rightarrow$ circulatory system
E) cardiac cell $\rightarrow$ cardiac muscle $\rightarrow$ circulatory system $\rightarrow$ heart