General exam question G8C09

WhyIn a mesh network of microwave nodes, if one node fails a packet may still reach its target station via an alternate node. A mesh network's defining strength is that its nodes can dynamically route around a failure, so if one node goes down, a packet can often still reach its destination by hopping through an alternate node in the mesh, answer B. Adding more nodes doesn't itself boost signal strength, links between different node pairs in the same mesh can and often do use different frequencies and bandwidths without that being a stated advantage of the mesh concept as posed here, and more nodes doesn't inherently reduce out-of-band interference, so A, C, and D are wrong.