How does single-mode fiber compare with multimode fiber?

A.
Single mode fiber has a higher bandwidth and lower loss.

B.
Multimode fiber has a higher bandwidth and lower loss.

C.
Multimode fiber is more often used for long-distance telecommunications.

D.
Single-mode fiber has higher loss and lower bandwidth.

Explanation:
Industry Standard Architecture – Student Guide 2 – Page 26:
Single-mode optic fiber
Single-mode fiber has the highest bandwidth and lowest loss performance. The core is so small
that only a single mode of light can enter it. Therefore, the chromatic and modal dispersion are
greatly reduced or eliminated.