$3.$ Tableau user$-$based subscription licensing imposes the following constraint:

a$.$ a$.$ limits the number of server nodes available in scale$-$out scenarios

b$.$ b$.$ specifies the maximum number of computer cores on which you can run tableau server

c$.$ c$.$ provides a guest account that allows users who are not signed in to access server views

d$.$ d$.$ limits the number of server users to the number of licenses owned by the organization