Distinguished architecture requires the expenditure of large sums of money, even if it is by no means certain that the expenditure of large sums of money produce distinguished architecture.

(A) even if it is by no means certain that the expenditure of large sums of money produce
(B) even if it is by no means certain that the expenditure of large sums of money will produce
(C) even though there is no certainty that the expenditure of money in large sums produces
(D) even though it is by no means certain that the expenditure of large sums of money produces
(E) though there is no certainty as to the expenditure of money in large sums producing

OA D