The boys respectfully wished their teacher good mornings.

The correct answer is: C. “Good morning,Madam,” said the boys to the teacher.

The boys respectfully wished their teacher good mornings. This means that they addressed her with a title of respect, such as “Madam” or “Sir.” Option A is incorrect because it does not include a title of respect. Option B is incorrect because it does not include the word “Madam.” Option D is incorrect because it does not include the word “boys.”

It is important to address people with respect, especially those who are older or in a position of authority. This shows that you value them and that you are taking them seriously.