The Impulse That Signals Each Heartbeat Is Conducted Along Which $\rightarrow$

The impulse that signals each heartbeat is conducted along which path? 1)
Atrioventricular node
2)
Bundle branches
3)
Sinoatrial node
4)
Atrioventricular bundle

A) 1 $\rightarrow$ 2 $\rightarrow$ 3 $\rightarrow$ 4
B) 1 $\rightarrow$ 3 $\rightarrow$ 4 $\rightarrow$ 2
C) 3 $\rightarrow$ 1 $\rightarrow$ 4 $\rightarrow$ 2
D) 3 $\rightarrow$ 4 $\rightarrow$ 2 $\rightarrow$ 1
E) 4 $\rightarrow$ 1 $\rightarrow$ 2 $\rightarrow$ 3