Final answer:
The correct answer is B. Although the 'Rens' soon became popular and were playing more than 100 games a season, the players were often turned away by prejudiced hotel owners and slept on the team bus.
Step-by-step explanation:
The correct answer is B. Although the "Rens" soon became popular and were playing more than 100 games a season, the players were often turned away by prejudiced hotel owners and slept on the team bus.
In this sentence, the conjunction 'although' is needed to indicate a contrast between the popularity of the "Rens" and the discrimination they faced from hotel owners. This helps to clarify the cause and effect relationship between the two clauses.