What is the loss budget for the above fiber link?

An ICT distribution designer installed a 50/1 ?5 mm/1300 nm fiber optic cable from Building A to identical Building B with a distance of 600 m (1968 ft) At Building B. the designer fusion splice this new cable to an existing identical 50/126 mm fiber optic cable that runs 800 m (2525 ft) to Building C. Both ends are terminated with SC connectors.

What is the loss budget for the above fiber link?
A . 2.95 dB
B . 3.40dB
C . 3.90 dB
D . 4.35 dB

Answer: C