Which of the following is an advantage of using single-mode fiber?

Single-mode fiber has a very small core diameter that allows only one mode of light to propagate, significantly reducing modal dispersion and enabling data transmission over much longer distances than multi-mode fiber. This makes it ideal for long-haul networks and high-speed data transmission over kilometers.

While single-mode fiber has a smaller core, this characteristic does not inherently give it a greater turn radius; both fiber types have limitations on bend radius to prevent signal loss.

The sturdiness of a fiber optic cable plant depends more on the cable's jacket and protective layers rather than whether it is single-mode or multi-mode fiber.

Although single-mode fiber cores are smaller, the overall cable diameter is often similar to multi-mode fiber due to necessary protective cladding and jackets.