C. an understood you, because usually you is the subject in the sentence, but it is understood without it.
Excitement
Herbert's victory at chess against his father
sinister
The chess game is very tense. Father and son duel and the Father even tries tactic to distract his son from noticing his error. After the son check mates his father, the Father becomes grumpy.
I want to say the answer is heroic because he did think it would help