The best option to prevent impact injuries during exercise is having a spotter (option C), as they provide essential safety support. Other options like lifting more weight, working out alone, or doing many repetitions do not enhance safety and may increase injury risks. Therefore, it's important to prioritize safety measures like having a spotter in weightlifting situations.
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Having a spotter is the best method to prevent impact injuries during exercise, as they provide necessary assistance and safety. Other options do not contribute to safety and could exacerbate risks. Always prioritize safety measures like having a spotter when lifting weights. ;