1 2 3 4 1 _ _ _ _ 2 _ _ _ _ 3 _ _ _ _ 4 _ _ _ _ ACROSS 1) the option to sell a given stock (or stock index or commodity future) at a given price before a given date 2) chocolate cookie with white cream filling 3) something left after other parts have been taken away 4) a hard grey lustrous metallic element that is highly resistant to corrosion; occurs in niobite and fergusonite and tantalite DOWN 1) a place (sea____ or air____) where people and merchandise can enter or leave a country 2) the chief solid component of mammalian urine; synthesized from ammonia and carbon dioxide and used as fertilizer and in animal feed and in plastics 3) a brittle silver-white metalloid element that is related to selenium and sulfur; it is used in alloys and as a semiconductor; occurs mainly as tellurides in ores of copper and nickel and silver and gold 4) a chronic drinker ** Scroll down for solution. ** Are you sure you want to peek? puts oreo rest tass