Which statement is true regarding the creation of nested plans using Resource Manager?

Which statement is true regarding the creation of nested plans using Resource Manager?

A.
Only one nested subplan is allowed.

B.
The plans can be nested up to four levels.

C.
Resource Manager does not support nested plans.

D.
Nested plans control only the degree of parallelism but not the CPUuuuu.

E.
Each nested plan gets a proportion of the CPU resources assigned to its parent group.