What is of ?

When writing a notation using the metric system, always:

A) Place the zero to the right of the decimal when the decimal is less than 1. B) Place the zero to the left of the decimal when the decimal is more than 10. C) Place the number after the abbreviation. D) Place the number before the abbreviation.

When used to control the flow of medical gases to a patient, how is a Bourdon gauge classified?

a. Fixed-orifice, variable-pressure flowmeter device b. Fixed-orifice, constant-pressure flowmeter device c. Variable-orifice, variable-pressure flow-meter device d. Variable-orifice, constant-pressure flow-meter device