Assuming the HOMEWORK10 table has three columns (Col1, Col2, and Col3, in this order), which of the following commands stores a NULL value in Col3 of the HOMEWORK10 table?
a. INSERT INTO homework10 VALUES (‘A’,  ‘B’,  ‘C’);
b. INSERT INTO homework10 (col3, col1, col2) VALUES (NULL, ‘A’,  ‘B’);
c. INSERT INTO homework10 VALUES (NULL, ‘A’,  ‘B’);
d. UPDATE homework10 SET col1 = col3;