Technician a States That Micrometers Are Used to Measure Long

Multiple Choice

Technician A states that micrometers are used to measure long distances. Technician B states that micrometers should always be stored with a gap between the spindle and anvil so metal expansion does not interfere with their calibration. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B