You are designing an optical network. Your goal is to ensure that your design contains the highest degree of resiliency. In which two ways will you leverage a wavelength-switched optical network solution in your network design? (Choose two.) 

Answer options:

A. a wavelength-switched optical network assigns routing and wavelength information
B. a wavelength-switched optical network takes linear and nonlinear optical impairment calculation into account
C. a wavelength-switched optical network guarantees restoration based strictly on the shortest path available
D. a wavelength-switched optical network eliminates the need for dispersion compensating units in a network

AB