The row formed at node ‘a’ in the cut set matrix in the figure shown below is?

• A. +1 +1 +1 +1 0 0 0 0
• B. +1 0 0 0 +1 0 0 +1
• C. -1 0 0 0 -1 0 0 -1
• D. -1 -1 0 0 -1 -1 0 0