April and her friend Norma were emailing back and forth about a pottery class April was taking. April’s last email said: (1) First you’re going to need some old clothes, because you will get dirty. (2) Dump a mound of clay on the wheel and get it spinning. (3) Be sure to keep the clay wet as you shape the vase. (4) It will take a couple of days to cool after you fire it in the kiln. (5) It’s really not that difficult to make a clay pot. Why does April include sentence 5 in her email? A. It is the key concept, that making a clay pot is not that difficult. B. It is a friendly way to convince Norma to take the class with her. C. It provides new information about the clay-molding process. D. It gives a counterargument against Norma’s opinion that pottery is difficult.