Need a better explanation

Hi Han,

Thanks for the feedback, you might be right. However, the hint and solution for this question has already been approved by another reviewer (status for both is QG), so it may be a bit awkward for me to make further revisions to this question.

Brian

BRIANCHAN (talk)‎

Dear Brian,

Never mind, I just expressed my opinion, it doesn't really matter if students don't get confused themselves.

Best

Han

HANHONG (talk)‎