Answer:A. Cannon's central theory
Step-by-step explanation:
The Cannon-Bard theory of emotion, which is als referred to as Thalamic theory focuses on physiological determination of emotion. This theory state that we feel emotions and then have a physiological reaction to those emotions. According to Cannon's theory emotions can be felt even when the physiological response is absent. Cannon's idea is different from the two factor theory because he suggest that our emotions are not dependent on physiological reactions.
Two factor theory states that physiological arousal brings emotional response whereas cannon's theory state that these two are not dependent on each other.
According to this theory grandma is indeed likely to experience emotions without physiological response.