Milgram set up an elaborate study on obedience where "teachers" were ordered to shock a "learner". In his first studies he found that $60\%$ of "teachers":

Select one:

a$.$ complied fully and delivered the highest level of shock.

b$.$ initially complied but refused to deliver more than slight levels of shock.

c$.$ refused to deliver even slight levels of shock.

d$.$ complied until ordered to deliver intense levels of shock.