Locational cost$-$profit$-$volume analysis assumes

$($I$)$ nonlinear variable costs.

$($II$)$ fixed costs that are constant over the range of possible output.

$($III$)$ accurate estimates regarding the required level of output.

$($IV$)$ multiple products.

I, III, and IV only

II and III only

I, II$,$ and III only

II$,$ III, and IV only

I, II$,$ III, and IV