As more and more consumers buy electric cars, a formerly minor concern becomes more pressing . Some types of electric vehicles rely on charging stations for power, and most charging stations are installed in the homes of electric vehicle owners . Public charging stations allow people to recharge their vehicles when are away from home, but few of these exist. According to the National Renewable Energy Laboratory , 11 states had no public charging stations as of June 2011, and 16 states had 10 or fewer. Which sentence would best conclude the paragraph ? A ) As electric vehicles become more widespread , states will likely be pressured to build additional charging stations . B) The maximum range of an electric vehicle depends on many factors , including the car^ prime s weight , acceleration , and battery size. C ) With over 2,000 public charging stations across the state , California offers electric vehicle owners the most flexibility in driving . D) A charging station uses a special outlet that can charge an electric vehicle's battery six times faster than a standard household outlet