Answer:
b. he believed everyone had the right to be represented by counsel when standing trial
Step-by-step explanation:
John Quincy Adams was a lawyer who chose to defend British soldiers who were accused of being among a rag-tag unit that were involved in the Boston Massacre which killed a lot of American colonists because he believed that everyone had the right to fair trial and representation.
The soldiers were accused of murdering rioters in Boston in 1770 and he acted as counsel for the eight accused men because he believed everyone had the right to be represented by counsel when standing trial