What Is Used to Remove the Material from a Hole

Multiple Choice

What is used to remove the material from a hole being drilled with a laser?

A) A jet of clean dry compressed air blasts the molten metal out of the hole.
B) Laser drilling is always done overhead so the molten metal will run out of the hole.
C) The intense heat vaporizes the spot with enough force to thrust the material out.
D) The laser is hot enough so that it passes through the molten metal until the hole is completed and then the molten metal drips out.