In how many different ways can Chloe select two digits out of $$ 0$$, $$1$$, $$ 2$$, $$3$$, $$4$$, $$5$$, $$6$$, $$7$$, $$8$$, and $$9$$ and put into the two boxes to make the below equality correct?  $$ 20- \square =22-\square $$ 
选项为:A:$$7$$  B:$$8$$  C:$$9$$  D:$$10$$  E:$$12$$  请回答其中一个选项.