Erik and Ivy each writes down a fraction. They are surprised to find that the fractions they write are very similar: the denominator of each fraction is exactly the same as the other\textquotesingle s numerator. What is the product of the two fractions? 
选项为:A:$$0$$  B:$\frac12$  C:$$1$$  D:$$2$$  E:It cannot be determined.  请回答其中一个选项.