In the Huawei Active-Active DR Solution, in which scenario must optical fibers be used for connection?
A . The distance between two data centers is shorter than 25 km, and the required number of optical fibers is smaller than 4 pairs.
B . The distance between two data centers is longer than 25 km, and the required number of optical fibers is greater than 4 pairs.
C . The distance between two data centers is longer than 25 km, and the required number of optical fibers is smaller than 4 pairs.
D . The distance between two data centers is shorter than 25 km, and the required number of optical fibers is greater than 4 pairs.
Answer: C