Research suggests that positive emotional reactions to stress may have the adaptive quality of enhancing 

A) fear reactions.
B) social, intellectual, and physical resources.
C) avoidance strategies.
D) use of defense mechanisms.

Research suggests that positive emotional reactions to stress can enhance social, intellectual, and physical resources, which may lead to increased resilience and adaptation to future stressors. A, C, and D are not supported as adaptive qualities of positive emotional reactions to stress by research.