Robert contributes $50,000 to acquire a partnership interest in Partnership A. His at-risk basis in Partnership A at the beginning of 2019 is $33,000, Robert is not a material participant in the Partnership. For 2019, Robert's share of Partnership A's loss is $40,000. If he has passive income from other sources of $35,000, how much of Partnership A's loss can Robert deduct in 2019? 50,000 40,000 35,000 33.000