Step 1: Recalling the organising process in order.
Organising unfolds as a series of steps, identifying and dividing the work, grouping similar activities into departments, assigning duties to specific people, and finally establishing who reports to whom.
Step 2: Matching part (i) to the case.
The passage says the students divided the whole event into manageable activities so that work does not overlap and the load is shared fairly, this is precisely the first step of organising, Identification and Division of Work.
Step 3: What logically follows.
Once the work is divided, the natural next steps are grouping related tasks together into departments (Departmentalisation), handing specific duties to specific students (Assignment of Duties), and deciding who each student reports to for their part of the event (Establishing Reporting Relationships).
Final answer: Option 1, Identification and Division of Work; Departmentalisation, Assignment of Duties, Establishing Reporting Relationships.