The probability that a student is not a swimmer is 1 / 5. Then the probability that out of five students, four are swimmers is?

Question

$$\begin{array} ((A) \: {C}_4^5 \bigg(\frac{4}{5} \bigg)^4 \: \frac{1}{5} \quad & (B)\; \bigg(\frac{4}{5}\bigg)^4 \: \frac{1}{5} \\ (C)\: {C}_1^5 \: \frac{1}{5} \: \bigg(\frac{4}{5}\bigg)^4 \quad & (D)\: None \: of\: these \end{array}$$