A recent and popular self-help book wryly notes that if adolescence was not so painful, it would have a droll comedic aspect, at least in retrospect.
was not so painful, it
was not so painful, they
were not so painful, they
were not so painful, it
were not so painful, being one
The correct answer to this question was D) based on based on pronoun agreement (understand this part), as well as "The "if" clause properly uses the subjunctive mood, "if adolescence were.""
Please explain why adolesence is followed by "were" as opposed to "was." I think I'm off on my understanding of subjunctive mood.
Thanks for your help.