The following Verilog code is an example of hierarchical code, meaning that a submodule is used multiple times in the larger circuit or main module. Review the code to get familiar with modular Verilog coding and select the correct descriptions.

$"w1"$ is the output of a multiplexer

The code is the behavioral representation

The code is the structural representation

There are three modules in the circuit which one of the multiplexer is the output module

Module "adder" has two inputs and two outputs.

The circuit has two multiplexers and one adder

Based on input $"$m$",$ the inputs to adder are $"$a$"$ and $"$b$",$ if m$=1,$ or $"$c$"$ and $"$d$"$ if m$=0$

Based on input $"$m$",$ the inputs to adder are $"$a$"$ and $"$b$",$ if m$=0,$ or $"$c$"$ and $"$d$"$ if m$=1$