Final answer:
The word 'sullied' refers to something being damaged or its integrity being tarnished, meaning option b. hurt is the correct answer.
Step-by-step explanation:
The word sullied in the context of the sentence 'Steroid usage has sullied the game of baseball; a once innocent game is now looked upon with doubt' means to damage the purity or integrity of something, in this case, the game of baseball.
Steroid usage has brought negative attention to baseball, tarnishing its reputation and making people question the legitimacy of the achievements within the sport. The correct option is b.