Which of the following is true about problem-and-solution essays? a. they are the most common type of writing prompt required of students. b. they are only written in classroom settings. c. they are a type of expository writing. d. they use only one type of organizational structure.

I think the correct answer would be C. Problem-and-solution essays are a type of expository writing. This type of writing involves presenting steps of a process, explanations and reasons. They are used to relay or convey an information. Essays of this type would require investigation around an idea, solve a problem or to evaluate an evidence.