One kind of computer can make $$4\times {{10}^{9}}$$ operations per second.~ How many operations can it make in $$5\times {{10}^{2}}$$ seconds? 
选项为:A:$$4\times {{10}^{11}}$$  B:$$2\times {{10}^{11}}$$  C:$$2\times {{10}^{12}}$$  D:$$20\times {{10}^{18}}$$  E:$$2\times {{10}^{19}}$$  请回答其中一个选项.