Malika developed and implemented a group diabetes class for ten participants. The majority of participants brought their spouses to each session. Malika selected a comfortable room and the class was in the evenings as most of the participants worked until 5:00 p.m. After each session, Malika felt as if she wasn't successful at guiding the sessions. What could have been a potential issue?

A) The room was too cold.
B) The lighting in the room was too dim.
C) The session was at a poor time.
D) The group size was too large.
E) There were no refreshments available.