Which of These Situations Best Describes a Situational Cause of Behaviour

Which of these situations best describes a situational cause of behaviour?

A) Straightening up the guest room, which is normally messy, because relatives are coming to visit.
B) Helping an older lady across the street because I am always thoughtful.
C) Someone who is normally grumpy, frowning about an exam as he walks out of the classroom.
D) Being on time for school every morning, because I am a punctual person.