During the air meter procedure, how long is an individual inversion limited to, and what is the minimum total agitation time?

• A. No more than 2 seconds at a time and at least 30 seconds total.
• B. No more than 8 seconds at a time and at least 50 seconds total.
• C. No more than 5 seconds at a time and at least 45 seconds total.
• D. No more than 10 seconds at a time and at least 60 seconds total.

Answer: (C)