According to the Research of Neumann and Struck (2000),participants Would

According to the research of Neumann and Struck (2000) ,participants would report that they expected a more positive mood state when they listened to a speaker who

A) spoke in a happy voice.
B) presented about material of specific interest to the listener.
C) seemed to have very high expertise on their topic.
D) sounded like an older,mature male.