Kind of the Idea in the city RP systems were they have:
1. View Lot
2. Buy Lot
3. Sell Lot
Except this is events so the events would be
Input
/OnOption1
/OnOption2
/OnOption3
/On Option4
Output
/SetOption [# of Options]
/Display Options [Center,Bottom, Chat Message]
When you do Display Options it is were you type in to the chat 1, 2, 3, etc.