Which of the Following Was an Important Outcome of Psychology's

Which of the following was an important outcome of Psychology's involvement in World War I?

A) Psychologists had the opportunity to refine clinical and therapeutic techniques on veterans experiencing shell shock.
B) Psychologists' development of mass intelligence testing provided further evidence to the medical profession that psychologists were legitimate professionals.
C) Psychologists were seen as intensely patriotic.
D) World War I provided psychologists with an opportunity to showcase the tools of their trade to the American public and the military.