A database administrator needs to create a federated database and configure access to join data from 3 Oracle instances, 2 SQL Server instances, and 1 DB2 database. Which objects are needed to establish the specified connections? 

3 Oracle servers, 1 Oracle wrapper, 2 SQL Server servers, 1 SQL Server wrapper, and nicknames for all databases. 

3 Oracle servers, 3 Oracle wrappers, 2 SQL Server servers, 2 SQL Server wrappers, and nicknames for
all databases. 

3 Oracle servers, 1 Oracle wrapper, 2 SQL Server servers, 1 SQL Server wrapper, 1 DB2 server, 1 DB2
wrapper, and nicknames for all databases. 

3 Oracle servers, 3 Oracle wrappers, 2 SQL Server servers, 2 SQL Server wrappers, 1 DB2 server, 1
DB2 wrapper, and nicknames for all databases.