Thinking about these terms (router, redundancy, and fault-tolerant), how can we describe what we've observed in the router logs at the end of this activity?
a) Router efficiency and redundancy were compromised, leading to fault tolerance.
b) Router redundancy ensured fault tolerance despite minor issues in the logs.
c) Router logs indicated faults that could be mitigated with redundancy measures.
d) Router logs displayed errors, indicating a lack of fault tolerance and redundancy.