Political Reasons because the Federalist's were "angry" at Louisiana.
Because if people wanted stable income then they wouldn't be very happy if they had gotten 1 type of pay that was awesome for them and then the next 1 was terrible then they wouldn't be very pleased
-hope it helps
(you might want to ask yourself how would you feel if your allowance was cut some 1 week and then you had another 1 that was good and it was never the same
I would say the answer is A.) its makes more sense then the rest of them hope this helps