Given a text T, and several options, according to the question posed in the text T to choose the most appropriate option from the options as the answer, please directly output the most appropriate option, do not need to output the explanation.

Which of the following is the most likely example of a tool of fiscal policy?
Option A:Public financing of a power plant.
Option B:Regulation of the payment system.
Option C:Central bank’s purchase of government bonds.

Answer: A