Which Item Would u Use?

Here's The Deal! A Grand Prix Is Set To Begin That Spans The Globe! Every Mario Kart Track Ever Made! But There Is A Catch! Which Ever Item u Choose, u Will Only Get 10 Of! Golden Mushrooms, Bullet Bills, And Spiny Shells Are Not Permitted! And There Are No Item Boxes Anywhere To Be Found Which Means Items Cannot Be Replenished! Whatever Item u Choose Must Be Rationed Out Carefully!