Which of the following cable types should be used to connect two storage arrays for replication if they are separated by a distance of 900 meters (2953 feet)?

CAT6 Ethernet copper cables have a maximum effective distance of 100 meters (328 feet) for typical networking, which is far too short for 900 meters.

Multimode fiber is designed for shorter distances, typically up to 300-550 meters (984-1804 feet) depending on the fiber standard and speed, making it insufficient for 900 meters.

Twin AX (twinaxial cable) is a direct attach copper cable primarily used for very short-distance, in-rack connections, generally limited to 10 meters, making it unsuitable for 900 meters.

Single-mode fiber is engineered for long-distance data transmission, reliably supporting distances ranging from several kilometers to tens of kilometers. Its small core and use of laser light minimize signal dispersion, making it the appropriate and effective choice for high-speed connections over 900 meters.