The Mineral Fluorite Is Commonly Sold in Mineral Shops as Octahedral

The mineral fluorite is commonly sold in mineral shops as octahedral (8-sided) objects.This shape originates from ________.

A) the typical crystal form of fluorite
B) a pseudomorph (false form) of fluorite from replacement of a salt,potassium chlorite,that grows in octahedral crystals
C) the growth of fluorite in caves and is the form the crystals grow in the open cavern
D) cutting a larger crystal along four perfect cleavage planes,forming a cleavage fragment