Assume that Product Z is made of two units of A and four units of B$.$ A is made of three units of C and four of D$.$ D is made of two units of E$.$ B is made of three units of E$.$ If $50$ units of Z is required to make, then how many units of C do they need? A$\mathrm{.}400$ B$\mathrm{.}150$ C$\mathrm{.}50$ D$\mathrm{.}300$ E$\mathrm{.}250$