You issue the following command: INSERT INTO homework10 (col1, col2, col3) VALUES (A, NULL, C). The command

Question:

You issue the following command: INSERT INTO homework10 (col1, col2, col3) VALUES (‘A’, NULL, ‘C’). The command will fail if which of the following statements is true?
a. Col1 has a PRIMARY KEY constraint enabled.
b. Col2 has a UNIQUE constraint enabled.
c. Col3 is defined as a DATE column.
d. None of the above would cause the command to fail.