Final answer:
In a new SAS session, 'work.newsalesemps' and 'sales' are not available unless previously defined. The 'sashelp.class' table is part of the default SASHELP library and is available immediately.
Step-by-step explanation:
The question is pertaining to which tables are available at the beginning of a new SAS session. In SAS, a new session starts with certain default libraries and their datasets
The 'WORK' library is a temporary library that is created new for each session, and it does not contain any datasets until data is explicitly defined within that session. Hence, 'work.newsalesemps' would not be available unless it is defined in the current session
. The 'sales' table is not a default SAS table and would not be available unless it has been previously defined and saved in a permanent library. On the other hand, sashelp.class is part of the SASHELP library, which is a collection of read-only datasets and other resources available to all SAS users. The SASHELP library is present by default in every new SAS session. Therefore, of the options provided, sashelp.class is the table available at the beginning of a new SAS session.