An empty jug has a capacity of $3.5$ litres.  Ben has a cup that holds $400$ ml when full.  Ben fills his cup up and pours the water into the jug.  He does this $8$ times in total.  How much more water could fit in the jug? 
选项为:A:$100\rm ml$  B:$200\rm ml$  C:$300\rm ml$  D:$400\rm ml$  E:$500\rm ml$  请回答其中一个选项.