A.I. Explanation:

Option 1: "for an alternative location"

Explanation: This option does not align with the context of the text, which discusses the potential relocation of headquarters and its impact on ticket prices. The phrase 'for an alternative location' does not connect logically to the idea of increased costs mentioned in the text.

Option 2: "at a higher cost"

Explanation: This option is correct as it directly reflects the text's statement about the potential increase in ticket prices due to higher boat registration fees. The phrase 'at a higher cost' is explicitly mentioned in the text, making it the most relevant choice.

Option 3: "at a discounted tariff"

Explanation: This option contradicts the main idea of the text, which indicates that prices would rise, not decrease. The term 'discounted tariff' suggests lower prices, which is the opposite of what the text conveys.

Option 4: "which are over budget"

Explanation: This option introduces a concept not present in the text. While it mentions budget concerns, it does not relate to the specific issue of ticket prices increasing due to relocation and registration fees, making it irrelevant to the context.