Final answer:
The valid IP address to connect to the router is a. 192.168.1.1, which is within the standard Class C network and the correct subnet defined by the subnet mask 255.255.255.0.
Step-by-step explanation:
To connect to a router with the IP address 192.168.1.0 on a standard Class C network using the subnet mask 255.255.255.0, you need an IP address that is within the same subnet. The valid IP addresses range from 192.168.1.1 to 192.168.1.254 for host addresses in this scenario. The addresses 192.168.1.0 and 192.168.1.255 are reserved for network identifier and broadcast respectively. Therefore, the valid IP address for your network adapter from the options given would be a. 192.168.1.1. Option b is the broadcast address, and both options c and d are on a different subnet.