Task: Class Definition Understanding (ontology: Human_Society/EmotionOntology)

Which of the following definitions best describes 'arousal'?

A. A mental process that is the psychological and physiological state of being awake and reactive to stimuli.
B. A mental process that gives rise to an appraisal.
C. A mental process during which information is evaluated, the outcome of which is a belief or opinion.
D. A mental process that involves thinking about a state of affairs that is not yet the case together with a desire for that state of affairs to come about.

Answer: A mental process that is the psychological and physiological state of being awake and reactive to stimuli.