Sonny borrowed a vacuum cleaner from his friend so that he could vacuum his house. He did not pay anything to use it. When Sonny brought the vacuum cleaner back to his friend's house, it was not working properly. His friend noticed that Sonny had improperly used the vacuum cleaner. What is the duty of care owed by Sonny? Group of answer choices Sonny is liable for failing to use ordinary care. Sonny is not liable Sonny is liable for gross negligence. Sonny is liable for failing to use reasonable care. Sonny is liable for slight negligence