Derrick lists down all whole numbers from $$1$$ to $$40$$. Lisa selects all odd numbers and adds them up. Aisha selects all the even numbers and adds them up. What is the difference between Aisha\textquotesingle s and Lisa\textquotesingle s sums? 
选项为:A:$$40$$  B:$$20$$  C:$$10$$  D:$$0$$  E:None of the above  请回答其中一个选项.