设有Teachers表,该表的定义如下:CREATE TABLE Teachers(Tno CHAR(8) PRIMARY KEY,Tname VARCHAR(10) NOT NULL,Age TINYINT CHECK(Age BETWEEN 25 AND 65) )下列插入语句中,不能正确执行的是 ( )
A. INSERT INTO Teachers VALUES('T100','张三',NULL)
B. INSERT INTO Teachers(Tno,Tname,Age) VALUES('T100','张三',30)
C. INSERT INTO Teachers(Tno,Tname) VALUES('T100','张三')
D. INSERT INTO Teachers VALUES('T100','张三')