Use reasoning to answer the following question.
He found it odd that while attending lecture the professor got preachy, and even weirder when his fellow students started to what?\nOptions:\n- applaud\n- laughed\n- learning\n- taking notes\n- fall asleep

applaud
Applauding means to show praise by clapping.

It's odd to praise a preachy professor.

.

So, the final answer is applaud