8. Oscar rented a bicycle from Rental Unlimited. A helmet and bike lock are provided with each rental. Oscar stopped at a restaurant while riding through the city. After he finished and went outside, he noticed the bike was stolen. He didn't lock the bike. Oscar is liable to Rental Unlimited based on his duty 0 A. to exercise care against negligence. O B. of mutuum. O C. to use gross negligence. O D. to use reasonable care