Because of the business community’s uncertainty about the President’s position in regard to the issue of the budget deficit, an unanticipated rise in interest rates has occurred.

(A) in regard to the issue of the budget deficit, an unanticipated rise in interest rates has
(B) on the deficit, an unanticipated rise in interest rates has
(C) regarding the budgetary deficit, an unan-ticipated rise in interest rates have
(D) on the deficit, an unanticipated rise in interest rates have
(E) regarding the deficit, an unanticipated rise in interest rats have

OA B
I am confused with OA because it says President’s position on the deficit. I think it not idiomatic