Answer:
B. He spent many hours studying their lives and learning about them from friends and family.
Step-by-step explanation:
The now deceased movie hero, Chadwick Boseman was so proficient at playing the roles of Jackie Robinson and Thurgood Marshall because he spent many hours studying their lives and learning about them from friends and family.
To play the roles of such iconic characters, Mr. Chadwick had to really dig in and spend considerable time around friends and family of the two characters to be able to interpret the roles so well. He spent quite some time honing his baseball skills so he could accurately portray Jackie Robinson and brush up his knowledge about the law to portray civil rights lawyer Thurgood Marshall well.