PT 59 S2 Q3

Despite the enormous number of transactions processeddaily by banks nowadays, ... ...

Which one of the following, if true, most strongly supports the claim above?
(A) Banks initially process all transactions using one set of computer programs, but then use a different set of programs to double-check large transactions.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Complete Section: LR-A, Dec. '09 LSAT (PT 59 Sec. 2)