I believe the correct answer is C) He.
The author may have opted for couplets as it is a specific method of writing poetry.
In my opinion, Professor Shlemiel from "The Day I Got Lost" is a COMPLEX character.
The reasoning is as follows:
A flat character is generally straightforward and remains the same throughout the narrative. In contrast, Professor Schlemiel is complex because he evolves as the narrative unfolds. Despite his constant forgetfulness, his memory surprisingly improves, allowing him to narrate his experiences in a remarkably detailed manner.
The correct word to fill in the blank is 'tempting'.