For a non-trivial solution | A | is

For a non-trivial solution | A

1.	For a non-trivial solution \| A \| is
A.	\|A\| > 0
B.	\|A\| < 0
C.	\|A\| = 0
D.	\|A\| ≠ 0
Answer» D. \|A\| ≠ 0