A packet of biscuits costs $$x$$ pence. I buy $$4$$ packets. Which expression shows how much change in pence I will get from £$$8$$? 
选项为:A:$$8-4x$$  B:$$800-4x$$  C:$$4x-8$$  D:$$800-40x$$  E:$$4x-800$$  请回答其中一个选项.