Samantha, Who Is Taking a Heavy Course Load This Semester

Multiple Choice

Samantha, who is taking a heavy course load this semester, has been falling asleep in class and at home when she studies. She also seems moody, irritable, overly sensitive to criticism, tense, and she has difficulty concentrating and remembering things. A likely cause of these symptoms is​  

A) a boring instructor. 
B) course material that is too difficult for her to comprehend. 
C) sleep deprivation. 
D) early onset Alzheimer's Disease