When creating a table, you can specify a column constraint for each individual column of either
“NULL” or “NOT NULL”. When column values are later evaluated within a query statement, which
of these is true?

A.
“0 is equal to null, the empty string ( ” ) is equal to null.

B.
“0 is equal to null, the empty string ( ” ) is not equal to null.

C.
“0 is not equal to null, the empty string ( ” ) is equal to null.

D.
“0 is not equal to null, the empty string ( ” ) is not equal to null.

Explanation: