Hi Dayang NurSyaza Annisha binti Awang Jamil thanks for reaching out. I went through the course activity and could complete it just fine. Please try to provide a different answer, or you might also want to check in with your course facilitator (by leaving a comment on the course page or contacting them via chat if they have it enabled on their profile) if the answers are case sensitive (e.g. the first letter is a capital letter). Let me know if you have further questions. Thank you.