The most effective way to avoid paying the ransom in a ransomware attack is to have a properly tested offline backup system. A ransomware attack is a type of cyberattack that encrypts the victim's data or systems and demands a payment for the decryption key. A properly tested offline backup system is a method of storing copies of the data or systems in a separate location that is not connected to the network or the internet. By having a properly tested offline backup system, the hospital can restore its critical server from the backup without paying the ransom or losing any data. The other options are not the most effective way to avoid paying the ransom in a ransomware attack, although they may be some preventive or detective measures. Employee training on ransomware is a preventive measure that can help raise awareness and reduce the likelihood of falling victim to phishing or other social engineering techniques that may deliver ransomware. However, it does not guarantee that employees will always follow best practices or that ransomware will not enter the network through other means. A continual server replication process is a method of creating copies of the server data or systems in real time or near real time. However, it may not be effective against ransomware, as the replication process may also copy the encrypted data or systems, making them unusable. A properly configured firewall is a preventive measure that can help block malicious network traffic and prevent unauthorized access to the server. However, it does not guarantee that ransomware will not bypass the firewall through other channels, such as email attachments or removable media.