"Aircraft declares fuel emergency, has x fuel left, using y fuel every z miles/minutes. Should you land at airport A)a1 B)a2 C)a3 or D)a4?" Usually giving distance or flight times away.
If you think about it, the mishap a/c has delcared an IFE/Fuel, so even if it has the fuel to get to the third closest airport, you don't send it there, you land it at nearest available strip that can handle a/c type, right? that's what I did, and I passed.....