Implementing load balancing is the correct strategy because it distributes traffic across multiple servers, ensuring that if one server goes down, the application remains available via the other servers. This meets the high availability requirement of ensuring continuous operation. Clustering is also a high availability strategy but typically refers to a group of servers working together to provide a single function which doesn't directly imply traffic distribution. Snapshots would not serve the purpose as they are typically used for data backup at a point in time. Adding more memory to servers does not address the single point of failure concern; while it might improve performance, it would not keep the system operational if a server fails.