Jelena Is Singing in a Musical That Involves Her Saying

Jelena is singing in a musical that involves her saying the sounds 'ee' and 'ah' repeatedly.What effect is this likely to have on her mood and why?

A) It is likely to lower her mood because making these sounds stimulates a facial muscle pattern that is like when we are sad.
B) It is likely to improve her mood because making these sounds lowers the temperature of the blood going to the brain.
C) It is likely to lower her mood because making these sounds stimulates the same hormones involved in aggression and territory defense.
D) It is likely to improve her mood because making these sounds stimulates the temporal lobe which holds our positive memories.