Final answer:
The reading passage suggests a theme of Survival and Desperation, as it depicts Twain's internal conflict and anxiety when tasked with running a river crossing under increasing pressure.
Step-by-step explanation:
The theme in a reading passage can be determined by examining various elements such as imagery, symbols, plot, setting, characters, and the structure of the text. In this passage, it is mentioned that Twain is challenged by the task of running a crossing on a river. Initially, he expresses confidence, but as the pressure mounts due to the increasing number of observers sent by Mr. Bixby, Twain's self-doubt and anxiety become apparent. This internal conflict and the external pressures create a sense of Survival and Desperation, as Twain struggles to maintain his composure and prove his capabilities.
The tension and potential consequences of failure evoke themes related to facing and overcoming doubts, the pressure of expectations, and the human response to high-stress situations. Hence, the most fitting theme for this passage would be C) Survival and Desperation.