Answer: B. Anca
Step-by-step explanation:
From the information provided in the question, we should note that Anca purchasing the tickets will lead to a more economically efficient outcome.
From the information given, we can see that Anca is willing to pay $1250 while Sean wants to pay $705. Therefrom Anca purchasing the tickets leads to a better efficiency.
We can also infer that if Anca pays $1,250, a consumer surplus of $550 is gotten while Sean would get a consumer surplus of only $5.
Therefore, the correct option is B.