In the last sentence, how does David's throat tightening and his attempting to hold back tears characterize the father?

Responses
A It shows that David is angry and is tired of trying to do things right for his son and wife.It shows that David is angry and is tired of trying to do things right for his son and wife.
B It shows that David is really too emotional and gets upset far too easily than any man should.It shows that David is really too emotional and gets upset far too easily than any man should.
C It reveals that David is ashamed of his son and ex-wife and wishes both of them would change their ways.It reveals that David is ashamed of his son and ex-wife and wishes both of them would change their ways.
D It reveals that David feels happy at his son's happiness and sorrowful at his not spending time with him.It reveals that David feels happy at his son's happiness and sorrowful at his not spending time with him.

D It reveals that David feels happy at his son's happiness and sorrowful at his not spending time with him.