Which is the BEST revision of this sentence? People, who are listening to their ipods while running are actually endangering their lives. A) People who, are listening to their ipods while running are actually endangering their lives. B) People who are listening to their ipods, while running are actually endangering their lives. C) People who are listening to their ipods while running are actually endangering their lives. D) People, who are listening to their ipods, while running are actually endangering their lives.