Arrange conference-related items in the logical event timeline. Items: (a) Conference (b) Registration (c) Participate (d) Invitation (e) Representatives

Introduction / Context:
We place actions/entities along a typical conference lifecycle: invite first, then the conference event, with representatives identified and registered, culminating in participation.

Given Data / Assumptions:

• (d) Invitation precedes everything.
• (a) Conference is the central event.
• (e) Representatives are the people designated to attend.
• (b) Registration formalizes attendance.
• (c) Participate occurs during the conference.

Concept / Approach:
Timeline: Send invites → hold conference (umbrella) with designated representatives → register them → they participate.

Step-by-Step Solution:

Verification / Alternative check:
Registration is logically tied to attendees; placing it after representatives is sensible.

Why Other Options Are Wrong:
They start with the event or misplace registration.

Common Pitfalls:
Confusing “representatives” (people) with an action step.

Final Answer:
d, a, e, b, c