B. Every 5 years
Every 5 years, The Dietary Guidelines for Americans are changed and published.
<span>The metric system is the most commonly used, most accurate, and easiest to use of all the measuring systems. </span>
It is found in the bones <span>such as hip bone, breast bone, </span>skull<span>, ribs, </span>vertebrae<span> and shoulder blades, and in the cancellous ("spongy") material at the proximal ends of the long bones </span>femur<span> and </span>humerus<span>. </span>
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