NIST divides the learning audience into three overlapping segments. Which set is correct?

Answer: B. All users; holders of privileged access accounts; people with significant security or privacy responsibilities

SP 800-50r1 describes three audience segments: all users, privileged access account holders, and employees and contractors with significant cybersecurity or privacy responsibilities, with overlap between the latter two.

Source: NIST SP 800-50 Rev. 1 (NIST) — Sec. 2.5 Learning Program Audience Segments