A.MAN Clusters, because they would allow you to synchronously replicate state in low latency networks 
B.WAN Clusters, because they would allow you to asynchronously replicate state in nonlow latency networks.  
C.Transaction Log in the database, because you could avoid synchronizing two replication technologies (database and file)  
D.Data Guard, because it is the most effective way to replicate a state across locations
E.GoldenGate, because it is the most effective way to replicate a state across locations

A.Check if archive file in the compressed version has a new REDEPLOY file.  
B.If server was started in the Development Mode. Auto-deployment is not supported in production  mode.  
C.If the application includes an EJB 3 module. Auto-deployment is not supported for EJBs.
D.You change JVM from HotSpot to JRockit. Auto-deployment is not supported in HotSpot auto  deployment.  
E.If the domain is a single-server domain. Auto-deployment is not supported in multiserver  domains.