What was the tutor's opinion on attending extra lectures?

The chosen answer reflects a view that emphasizes voluntary participation in extra lectures rather than compulsion. When the tutor states that there is no obligation, it indicates that while attending extra lectures may be beneficial, students are not required to do so. This suggests a supportive but non-mandatory approach, affording students freedom in their learning choices, aligning with educational practices that encourage engagement without enforcing strict requirements.

The other options undermine this idea of voluntary participation by implying either strong encouragement or a necessity. For example, claiming that it was highly encouraged or mandatory suggests a level of compulsion that is contrary to the idea of attending without obligation. Therefore, the selected answer accurately captures the tutor's opinion as one that promotes optional attendance, granting students the agency to decide based on their individual needs.