1. 1. CREATE TABLE SALARY. 2. (employee_iNUMBER(9) 3. CONSTRAINT salary_pk PRIMARY KEY, 4. 1995_salary NUMBER(8,2), 5. NUMBER_manager_name VARCHAR2(25) 6. CONSTRAINT mgr_name_nn NOT NULL, 7. $_salary_96 NUMBER(8,2)); 上面的哪两行将引起错误？（）
A. 1.
B. 2.
C. 4.
D. 7.
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