The Decisions section explains Dialog basics.
Approve Single or Multiple Options
At any time a Dialog can be configured to allow single or multiple option approval:
Approve single option is the default as it is usually easier to force a single answer to the Dialog’s question.
Promoting an Option
When someone else creates an option for a Dialog it cannot be approved until you, the creator of the Dialog, allow it.
You can drag and drop the option to the section you want or promote or demote it using the button in the upper-right corner of the option.