Click the Exhibit button to view the graph.

The graph represents optical signal power versus wavelength measurement from 1550nm to
1560nm. What is the worst case optical signal-to-noise ratio (OSNR) of Channel 1 at 0.5nm away
from the peak?

A.
21dB

B.
24dB

C.
27dB

D.
30dB

E.
33dB