Jiangtian City Bureau of Finance decided to send a comrade to the rural areas to help the poor according to the instructions of the superiors. Many comrades such as A. B, C, D, and E of the Bureau of Finance actively registered and applied for the trip after knowing the news. According to the registration and the work needs of the Bureau The leaders of the bureau made the following decisions: (1) At least one person was selected from A and B; (2) At most one person was selected from B and C; (3) Among A and D At most one person is selected; (4) If Ding is selected, then C and E are indispensable. Based on this, can it be launched? ["Don't pick Ding.", 'Picking A.', 'Not picking A.', 'Picking Ding.']