What does the discovery of a perfectly rectangular iceberg in Antarctica most likely indicate about its formation or characteristics?
A) The iceberg is a man-made object designed to study ice formation.
B) The iceberg's shape is due to natural geometric processes such as calving from a glacier with a rectangular edge.
C) The iceberg's shape results from artificial manipulation of ice in the Antarctic region.
D) The iceberg is an optical illusion caused by light refraction through the ice.