According to the text, at one point in his research career, Dolf Zillmann decided to stop

doing research on the effects of sexually explicit media. Why did he make that decision?

a. He believed that all of the important questions had been answered.
b. He could not find sexually explicit material that was nonviolent.
c. He was pressured by university administrators to stop doing research in a
controversial area.
d. Local courts declared the material used in his experiments were legally
“obscene.”
e. His closest research collaborator received death threats and threats of sexual
abuse of his wife and children.

e.