Which of the following are best practices regarding effective dates versioning?

When retiring a position end date it by populating the effective end date with the last day of the position.

Never end date a compensation rule. Instead inactivate it by removing the rule from all compensation plans.

When a participant leaves a position do NOT end date the position. Instead inactivate it by removing the participant from the position.

Plans plan objects should only be versioned on a leaf period boundary.