Answer:
Watching an exciting movie.
Explanation:
The word "enthralled" means being "interested", caught the attention, or focused, captivated, or fascinated by something. It means getting the attention or paying attention to what was shown or being done.
So, in the given sentence, the speaker remarks how he was captivated by the Shakespeare play even though he thought it'd be boring. That means that the play was interesting. So, the <u>person most likely to be "enthralled" is someone who is watching an exciting movie</u>.
Thus, the correct answer is the fourth option.