What is the missing number in the number pattern below?  $$2750$$, $$2950$$, $$2850$$,~\uline{~~~~~~~~~~}~, $$2950$$, $$3150$$, $$3050$$ 
选项为:A:$$2750$$  B:$$2850$$  C:$$2950$$  D:$$3050$$  请回答其中一个选项.