Consider the Following Tree Diagram: Which Arithmetic Expression Is $\times$

Multiple Choice

Consider the following tree diagram: Which arithmetic expression is represented by this tree?

A) 2 $\times$ 3 + 5 + 4 $\times$ 6 - 1
B) 2 $\times$ 3 + 5 + 4 - 6 - 1
C) 2 $\times$ (3 + 5 + 4) $\times$ (6 - 1)
D) [(2 $\times$ 3) + 5 + 4] $\times$ (6 - 1)