Answer:
e) onboarding
Step-by-step explanation:
Onboarding is the process by which new employees are introduced to the companie's culture including operational procedures and training on their job roles.
Onboarding is an important step in making the employee more efficient on the job. It is also called organisational socialising.
In the given scenario where new employees fly to a three-day training session at Uberversity in San Francisco to learn about the company, is an onboarding process.