A bag contains $$20$$ red discs, $$10$$ green discs and $$30$$ blue discs. A disc is chosen at random. Which of these events is the \textbf{most} likely? 
选项为:A:The chosen disc is red.  B:The chosen disc is blue  C:The chosen disc is not red.  D:The chosen disc is green or blue.  E:The chosen disc is not green.  请回答其中一个选项.