A firm makes two products, Y and Z$.$ Each unit of Y costs $$16$ and sells for $$40.$ Each unit of Z costs $$10$ and sells for $$25.$ If the firm's goal were to maximize profit, what would be the appropriate objective function? A$.$ Maximize profit $=$ $$39($Y $+$ Z$)$ B$.$ Maximize profit $=$ $$24$Y $+$ $$15$ZO C$.$ Maximize profit $=$ $$24$Y $=$ $$15$ZO D$.$ Maximize profit $=$ $$40$Y $+$ $$25$Z E$.$ Maximize profit $=0\mathrm{.}4$Y $+0\mathrm{.}4$Z