Which of the following statements are true?

I. Activity based costing $($ABC$)$ can only be applied to service industries.

II$.$ Many service applications involve high fixed costs and the higher the number of cost units produced, the higher the fixed costs per unit.

$\backslash$table$[[$A$,[,$I only$],[$B$,[,$II only$],[$C$,[,$Both I and II$],[$D$,[,$Neither I nor II$]]$