Teacher Anderson has pens with three different colours, $$12$$ black, $$8$$ red and $$10$$ green. He put all of these pens in his pencil case. If he close his eyes and randomly pick a pen, at least how many pen he must pick to guarantee he get a red pen?． 
选项为:A:$$1$$  B:$$3$$  C:$$8$$  D:$$22$$  E:$$23$$  请回答其中一个选项.