Customers come from _ _ _ _ _ _ _ _ _ _ _ _ _ a ) Inside ( internal ) of the organization

Customers come from $\_\_\_\_\_\_\_\_\_\_\_\_\_$

a$)$ Inside $($internal$)$ of the organization

b$)$ Outside $($external$)$ of the organization

c$)$ A geographic area that could almost always be defined as within $\mathrm{20}$ miles of the physical location of the organization

d$)$ Both inside $($internal$)$ and outside $($external$)$ of the organization