What was the professor's attitude toward attendance when Bill had to miss class?

The professor's attitude toward attendance being indifferent suggests that he did not place significant importance on whether or not students were present in class. This could imply that he believed students could still learn and succeed without attending every session or that he trusted students to manage their own responsibilities, providing them the flexibility to make choices about their attendance. This attitude may foster a more relaxed learning environment, allowing students to feel less pressured about attendance requirements and more focused on the learning material itself.

In contrast, a strict attitude would mean the professor had firm rules regarding attendance, which could lead to mandatory participation. Encouragement would imply a more positive reinforcement approach, motivating students to attend class, while imposing penalties indicates a disciplinary approach towards those who miss class. These options suggest a more engaged or consequences-driven stance on attendance, which does not align with the notion of indifference.