To determine which topic provides the basis for a warranted theme in the passage, we would need to consider the content and main ideas of the passage itself. However, based on the options provided:
- A. competition could suggest themes around rivalry or striving for success.
- B. achieving big dreams implies an inspirational theme about pursuit and fulfillment.
- C. family relationships might lead to themes involving connection, support, or conflict within families.
- D. employment opportunities could focus on themes related to career paths, jobs, and economic factors.
If the passage deals with aspiration, perseverance, or success in personal goals, then B. achieving big dreams would likely be the most appropriate choice for a warranted theme. If the passage is about competition in a specific context, then A. competition might be the right answer. Without additional context, I can't definitively choose one.