Either b or d, but i think your best bet is with d.
The author's purpose for including this paragraph is to explain the resistance that Branch Rickey willingly took on in an effort to being the process of ending segregation in Major League Baseball. This paragraph serves to explain that there were people off the field who also helped revolutionize the game.
The direct object in this sentence is the yard. Thus, the answer is letter B. This follows the transitive verb which is a type of an action verb. From the sentence this transitive verb is "sells". Direct objects can either be noun, pronoun, clause, or phrase.
