Questions in the Activity tab

Some of the questions in the activity tab seem to be unrelated to the topic in the lecture video and related content was not discussed. Its been tough and had to perform multiple attempts to get the correct answer. Is it expected for the students to review materials outside of these lectures to complete these activities since those stop us from moving forward to the next video? Even at that point, we are not sure how that answer is correct and the previous selected was not. Justification of the correct answer would help.