Final answer:
To resolve the issue of an incorrect WEP key, you should forget the wireless network on your device and then reconnect, which will prompt you to enter the correct WEP key.
Step-by-step explanation:
If you have used an incorrect WEP key and your device is no longer prompting you to enter the key again, the best course of action would be option B) Forget the wireless network on your device and reconnect. This can typically be done by going to the Wi-Fi settings on your device, selecting the network you're trying to connect to, and choosing the option to forget or remove it. Once the network is forgotten, select it again from the list of available networks, and you should be prompted to enter the correct WEP key. Ensure that you enter the correct key to establish a successful connection.