The correct answer is C, use correct posture. Not using correct posture when performing resistance training with weights can lead to serious injury, in most cases it can cause back problems over time. The most common example of doing resistance training with weights and not using the correct posture would be lifting a heavy object with your back instead of your knees/legs. Hope this helps.
Girls usually begin puberty between the ages of 8 and 13 years old. The earliest sign of puberty in most girls is the development of breast "buds," nickel-sized bumps under the nipple.
