But what is required is what question
I believe the answer would be B. Suspension of disbelief.
I believe the answer you are looking for would be the second answer choice, "We read Shakespeare's tragedy, <em>Othello</em>, after reading two of his comedies."
This is because when information already speaking of something mentioned, is referred to to clarify a subject, it must be separated by commas. (that's how I remember)
ex: My mother, the queen, is placing a new law down to make everyone have equal rights.
ex: Today I went to Ms. Green's, the principal's, office.
"Alcoholism is when one can no longer control their use of alcohol, compulsively abuse alcohol, despite its negative ramifications, and/or experience emotional distress when they are not drinking may be suffering from an alcohol use disorder (AUD) or alcoholism.1 AUD is a chronic, relapsing disease that is diagnosed based on an individual meeting certain criteria outlined by the Diagnostic and Statistical Manual of Mental Disorders (DSM-5)."
Feel free to pick out which parts you want to use :)