Tom starts a savings account with ＄$$4,000$$ at a bank. The interest rate is $$2\textbackslash\%$$ per year. How much interest will he earn in his savings account at the end of the second year? 
选项为:A:＄$$160$$  B:＄$$161.6$$  C:＄$$4,160$$  D:＄$$4,161.6$$  请回答其中一个选项.