How to align the delay of 2M multipath lossless protection?

How to align the delay of 2M multipath lossless protection?
A . The value is aligned with the latency of the path set by the user and compensates for the corresponding latency
B . Align with the longest path delay and compensate for the corresponding delay value
C . Align with the delay of the longest protection path and compensate for the corresponding delay value
D . Align with the delay of the shortest protection path and compensate for the corresponding delay value

Answer: C