Should it only accept an answer as correct if it has 这个 for "the", or should it also accept it without 这个?

"Zhe ge" shouldn't be required unless the English is changed to "this" party

English answer says "the party", but w/o 这个 it won't accept answer....

7/9/18

也可以说： 我应该穿什么衣服为派对？