Pick the right explanations about Roles and Role Hierarchy.

A) Each client must be allocated to a part, or their information won't show in circumstance reports, conjecture roll-ups, and different presentations in light of parts.

B) At the point when a record proprietor isn't allocated a part, the sharing access for related contacts is Read/Write, gave the association-wide default to Contacts isn't Controlled by Parent.

C) Both (A) and (B)

D) It is constantly important to make singular parts for each title at your organization, instead of characterize a pecking order of parts to control access of data entered by clients in bring down level parts.