Which of the following is not true of stalagmites and stalactites?

• A.stalagmites are upward growing pillars while stalactites are downward growing
• B.stalagmites are short and wide while stalactites are long and narrow
• C.stalacties are formed on the floor of limestone caves while stalagmites are formed on roofs of limestone caves
• D.stalactites are longer than stalagmites