Three Icebergs Are Each Floating in Bathtubs Filled to the Brim

Multiple Choice

Three icebergs are each floating in bathtubs filled to the brim with water.Iceberg A has large air bubbles in it.Iceberg B has unfrozen water in it.Iceberg C has an iron railroad spike in it.When the ice melts,what happens?

A) The water level in C will decrease while the other two water levels will remain the same.
B) Only the water in C will spill over.
C) The water level in A will stay the same,while the other tubs will spill over.
D) All the tubs spill over.
E) All stay exactly the same.