What is the product of five fractions, whose denominators are $5-1$ in descending order, and the numerators are $1-5$ in ascending order？ 
选项为:A:$\frac1{25}$  B:$\frac1{2}$  C:$\frac1{5}$  D:$$0$$  E:$$1$$  请回答其中一个选项.