What grade did Waxmo assign to Duane for his essay on pimples?

In evaluating the given options, the choice of C for Duane's essay on pimples suggests that the essay was likely viewed as below average or unsatisfactory by Waxmo's standards. A D grade typically signifies that the work meets only the minimum requirements, indicating significant issues such as a lack of structure, poor argumentation, or inadequate analysis. This grading reflects a critical assessment of Duane's performance, pinpointing areas that need considerable improvement.

In contrast, higher grades like B- or A would imply a more favorable evaluation, suggesting that the essay had a good structure, clear arguments, and was well researched. Choosing a grade of C would indicate that Duane's essay fell short of these standards, aligning with the characteristics typically associated with a D grade.

Thus, the conclusion that Duane received a grade of C for his essay is indicative of a competent but ultimately flawed piece of work, likely due to specific shortcomings that held it back from achieving a higher evaluation.