<span>Deltoid, gluteus medius, rectus femoris, vastus lateralis. Most used are Vastus lateralis and rectus femoris in infants b/c of poorly developed gluteus muscles.</span>
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Your answer will be answer choice B. Nobody thinks exactly the same as you do and nobody has to think the same as you. We have differences and that’s okay, I hope that this helps you
B. most exercise machines require spotters for safe operation.