Rachel is a mom to a 1st grader. She has been helping her s…
Rachel is a mom to a 1st grader. She has been helping her son Daniel with math for the past hour. She again asks him for the 100th time what is 3 + 2. Once again Daniel answers 4. All Rachel can do is drop her head and look down at her feet in frustration. Which muscle did she use to flex her head?
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