Several parts of a plant are named. What route does water follow through the plant?
- A$1 \rightarrow 4 \rightarrow 2 \rightarrow 3$
- B$1 \rightarrow 2 \rightarrow 3 \rightarrow 4$
- C$3 \rightarrow 1 \rightarrow 4 \rightarrow 2$
- D$3 \rightarrow 2 \rightarrow 4 \rightarrow 1$