What is the effective bandwidth of a 6 node, four-fiber OC-48 BLSR ring if all the traffic on the ring…?

What is the effective bandwidth of a 6 node, four-fiber OC-48 BLSR ring if all the traffic on the ring
is homed back to one node (hub-and-spoke) without Protection Channel Access (PCA)?

A.
STS-24

B.
STS-48