It would be "Himself", since in the sentence, is the hint "his kite take flight." Also reading it, it sounds like it's in the third person point of view, another hint.
I think A but I’m not sure
Macbeth is a heroic soldier and an honorable man.
I would say D. valid is the correct answer
Answer: I don’t believe there is an error
Explanation: I’ve looked over this multiple times, and with the options given, there doesn’t seem to be a mistake. I hope this helped! And sorry if I missed an error (if there is one). But I’m pretty sure there isn’t any.