What Role, If Any, Can Orientation Practices Play in Retention

What role, if any, can orientation practices play in retention?

A) Well done orientation can increase employee retention by as much as 25 percent.
B) Orientation can affect retention, but only if new employees are assigned to mentors upon entry to the organization.
C) "Realistic" orientation encourages newly hired employees to quit immediately when they perceive that the organization is a poor fit for them.
D) Orientation practices have little effect on retention of employees.