Sit ups, because you are using your core.
Answer:
Pretty sure it's System Lockout
Explanation:
The pure food and drug act of 1906 is a revolutionary legislation for America consumers no longer had to put up with cheap, Misbranded foods and medications. Companies producing food and drugs could no longer make “ false claims” or mislabel their products and deceive the public.
A dull sound would be expected from the liver