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Select the correct answer from each drop-down menu. In an experiment, Dr. Travis examined the effects of calcium intake on osteoporosis, a condition that causes an increased risk of bone fractures. The amount of calcium is variable. The risk of bone fractures .
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The most effective way to provide children with safety messages is to
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Select the correct answer from each drop-down menu.
In an experiment, Dr. Travis examined the effec...
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