Dear Pattarasunda,
I have read your post as shown below.
I notice that you have answered the questions to a different version of the course. IGW has lots of different possible questions which are rotated. We have all been answering version 3 of the questions and you have answered version 1.
I feel obliged to refer you to GCA’s Plagiarism policy found in “Getting started" link on the main page of the course. Please read it carefully.