Charlie joined the workforce at Eggcellent Foods about three months ago, beginning initial training with the 5-day "New Employee Crash Course." On the last day of the training, Charlie met the assigned mentor for bi-weekly meetings and the assigned work "partner." Assigned partners at Eggcellent help each other if one becomes overloaded with work. Over the following three months, Charlie participates in numerous activities including departmental lunches, informal and formal team meetings, and the company's quarterly "Others First" charity event. Charlie has completed the probationary period and the department members gather to celebrate as Charlie was recognized by the department manager for early contributions to the team. What process has taken place in the first three months of Charlie's employment? Group of answer choices Selection Transition Recruitment Onboarding and socialization