Adrian finished doing his homework at $$1$$ p.m. He started doing his homework $$2$$ hours ago. At what time did he start to do his homework? 
选项为:A:$$11$$ a.m.  B:$$11$$ p.m.  C:$$3$$ a.m.  D:$$3$$ p.m.  请回答其中一个选项.