Answer:
B. Estoy
Explanation:
Soy doesn't fit the sentence
The right answer is, B. Estoy.
Yo no estoy feliz porque no aprobé el examen de física.
Because in the sentence the temporal state of a subject is being described due to a circumstance, therefore the option that is used to express this type of action is b.
But about what?? can you give the entire plot?
