The answer is A and C.
This is done by IPv4 summarization. Both are correct.
Your subnets 192.168.146.0/24, 192.168.147.0/24, 192.168.148.0/24, 192.168.149.0/24 are Aggregated.
summarization calculator:
https://cway.cisco.com/tools/RouteSummary/Regards,
Deepak Kumar
Regards,
Deepak Kumar
Regards,
Deepak Kumar,
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