Before the Brooklyn Dodgers Signed Jackie Robinson, Leading to the Integration

Before the Brooklyn Dodgers signed Jackie Robinson, leading to the integration of major league baseball, their general manager sought assurances

A) that Robinson's substantial earnings would be managed by his agent.
B) that there were no incidents in Robinson's past to indicate a pattern of disciplinary problems.
C) that Robinson could withstand extreme racial taunting and hostility without retaliating.
D) that Robinson would not join the players' union.