4. There are 99 positive integers, their sum is 101101, the maximum possible value of the greatest common divisor of these 99 positive integers is ( ).
A. 101
B. 143
C. 1001
D. 70
4. C
98 1001s, 1 3003, their sum is 101101, the greatest common divisor is 1001. The greatest common divisor cannot be greater than 1001, because $101101=101 \times 1001$. Here, 101 is a prime number.