Which of the following is the determinant of the skew-symmetric 3×33 \times 33×3 matrix A=(0ab−a0c−b−c0)A = \begin{pmatrix} 0 & a & b \\ -a & 0 & c \\ -b & -c & 0 \end{pmatrix}A=0−a−ba0−cbc0?
abcabcabc
a2+b2+c2a^2 + b^2 + c^2a2+b2+c2
000
a+b+ca+b+ca+b+c