4. Cups and glasses are taking too long to air-dry. This could be cause by A. Incorrect timing of the wash cycle.
B. An improper use of chemical sanitizer.
C. The water temperature being too high.
D. The ventilation system not working properly.

D

Explanation:

it is being air dryed so nothing to do with wash cycle or chemical sanitizer and even if the water temp is high it will still air sry so D is the right answer

i'm pretty sure questions like these aren't allowd.   but, sure.   i can and talk : ))