. The product of the bit rate and distance of a fiber-optic system is 2 Gbits-km/s. What is the maximum rate at 5 km?
∙ A. 100 Mbits/s
∙ B. 200 Mbits/s
∙ C. 400 Mbits/s
∙ D. 1000 Gbits/s
∙ A. 100 Mbits/s
∙ B. 200 Mbits/s
∙ C. 400 Mbits/s
∙ D. 1000 Gbits/s