[k.s110]

Firstly, I apologies to any visually impaired users as I'm sorry but I have to upload the following diagram as it is the only way to express the question.

I have uploaded the question and have attached it with this thread

http://i62.tinypic.com/2livns7.png

The answer I chose was B because in the matrix C requires connection to A E & F and G requires connection to D and E and the only graphic representation which can do this is B. I very sure I'm correct =]

Attached image(s)

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[macosxnerd101]

You can plug your matrix into Wolfram alpha and it will generate the graph. Give it a try. We are a help forum, not a grading forum.