B is the answer of this question
It is reasoning logically from the cause to the effect and the general to the specific
i.e.
the attached picture
3. I have tried everything I can to stop my partner walking around naked.
The theme highlighted in the mentioned excerpt would be perseverance.
The excerpt tells of Rainsford's courageous act of braving the sea to go to the direction of the shots despite of the harsh conditions at the sea. This is evidenced by the phrase "he fought the sea".
The term "doggedly" also describes a persistent pursuit which was what Rainsford showed. He showed perseverance in his actions.