The answer is the first one, A. It is the source of implied powers.
Answer:
Herbert Hoover earned the nickname "The Great Humanitarian" because he A) successfully managed the distribution of food to Allied nations throughout World War I. He was largely successful in handing out humanitarian aid in war-time Belgium. He wanted to make it his goal to feed all of Belgium during the war period and actually was able to do this, along with giving many Belgians clothes and cash which was well distributed among the population and never reached the hands of the Germans.
Explanation:
