25.

Answer and Explanation

Your Answer is

Correct Answer is B

Explanation

The previous sentence "These streamlined fish do not often attack humans, but many people learn from experience that they are easy prey after being stabbed", and the second sentence "Before attempting spearfishing, novice divers should Gain self-confidence so they don't feel intimidated when they attract dace." Before and after is a causal relationship. B is correct.