Which of the Following Statements Is LEAST-Likely True

Which of the following statements is LEAST-Likely true?

A) Laser measuring systems are extremely accurate when properly installed and used.
B) The word laser stands for "light amplification by stimulated emission of radiation."
C) A laser is good for measuring because it shoots out a perfectly straight beam of light.
D) A sonic measuring system is a tool designed to save time checking symmetry when measuring damage or straightening a vehicle body