Which of the Following Characteristics Describe Stage 2 Non-REM Sleep

Which of the following characteristics describe stage 2 non-REM sleep? Select all that apply.

A) It occurs at the onset of sleep and lasts approximately 7 minutes.
B) During this stage, theta waves are primarily seen on EEG.
C) This stage is known as deep sleep where heart rate and BP are decreased.
D) This stage has interruptions of spindle activity that helps with integration of new memories.
E) Muscles of the body are relaxed.