Which of the following correctly describes the low level code for the end items, assemblies, and parts depicted in the following product structure trees? You may need to use the scroll bar on the bottom of the page to see the entire diagram.

Select one:

a$.$ The low$-$level code of $A$ is $1$ and I is $1.$

b$.$ The low$-$level code of $A$ is $0$ and $C$ is $1.$

c$.$ The low$-$level code of $J$ is $1$ and $D$ is $3.$

d$.$ More than one of these answers is correct.

e$.$ The low$-$level code of $K$ is $2$ and $x$ is $3.$