Dennis and Claudia were partners who operated a retail store. They agreed to end the partnership. Dennis agreed to stay at the store and oversee the going-out-of-business sale. Claudia agreed to deal with the accountants and other matters not directly related to the hands-on operation of running the store. Claudia received notice that the store's liability policy would expire on July 1. She decided not to renew the policy and let it lapse. The going-out-of-business sale would not be completed until August 1. In July, a customer slipped and fell in the store. When Dennis learned that Claudia had allowed the liability policy to lapse, he was very upset and claimed he should not be liable for the customer's injury. Is Dennis liable to the customer