9. Four companies belong to a group and are listed on a stock exchange. The cross-hold- ings of these companies are as follows: Company A owns 20 percent of Company B and 10 percent of Company C. Company Bms 15 percent of Company C. Company Cowns 10 percent of Company A, 10 percent of Company B, and 5 percent of Company D. Company D has no ownership in any of the other diree companics