But for his help, we wouldn't have succeeded. So we ______ his timely aid. [ ]

A. distributed

B. contributed

C. acknowledged

D. admitted

设任意一个十进制整数D，转换成对应的无符号二进制整数为B，那么就这两个数字的长度(即位数)而言，B与D相比______。

A) B的数字位数一定小于D的数字位数
B) B的数字位数一定大于D的数字位数
C) B的数字位数小于或等于D的数字位数
D) B的数字位数大于或等于D的数字位数