问题
______ final competitors is limited though _____ people have signed up for the short list.
A:The number of; a number of
B:The number of; the number of
C:A number of; a number of
D:A number of; the number of
B:The number of; the number of
C:A number of; a number of
D:A number of; the number of
正确答案是：
