问题

The opening ceremony of the 29th Beijing Olympic Games was _____ that everybody was greatlyimpressed_____ it. [ ]
A: a such big success; at
B: such a big success; on
C: a so big success; by
D: so big a success, with
B: such a big success; on
C: a so big success; by
D: so big a success, with
正确答案是: