What is the primary duty of care that employers should exercise when giving employment references on past employees to new employers?

a$.$

To provide the most positive and glowing reference possible to help the former employee secure a new job.

b$.$

To ensure that the reference is entirely truthful, accurate, and based on documented and verifiable facts.

c$.$

To withhold any negative information about the former employee, even if it is relevant to the new employer.

d$.$

To share personal opinions and subjective assessments about the former employee's character.