1. (10 points) If four consecutive natural numbers are all composite, then the minimum value of the sum of these four numbers is ( )
A. 100
B. 101
C. 102
D. 103
【Analysis】Since the sum of any four consecutive natural numbers must be divisible by 4 with a remainder of 2, among the four options given in the question, only 102 satisfies this condition.

【Solution】Solution: Since the sum of any four consecutive natural numbers must be divisible by 4 with a remainder of 2,
$$
102 \div 4=25 \cdots 2,
$$

so among the four options, only 102 satisfies the condition.
Therefore, the correct choice is: $C$.