C Mr. Chapman approached Mr. Liang on the street and said that he heard that Liang was the business partner of Ms. Godard. Chapman said that Godard owed him $30 000 under a contract, and that if Liang didn't pay up, he would sue Liang and Godard. Liang denied that he was Godard's partner. Chapman cited the following facts, all of which he could prove. Which of these facts is the strongest evidence of the existence of a partnership? Liang and Godard work together for a non-profit charity