I would have to go with B) because the government doesn't do A and C in every place but they do make sure all food products are safe (FDA)
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They are better for the environment because they don't require developing.
They can be viewed on a computer monitor within seconds of taking the image.
They can be enhanced and enlarged for better diagnostics.
They can be sent to other providers in an instant via email.
D . None of above everyday lifestyle choices affect your physical fitness