Question

As a classroom warm-up problem, Ms. Hughes drew this network and askedher students to write down the path that showed traceability.

Answer 1

18) Letter B

You can draw the path and see you dont repeat any line.

19) C - The quadrilateral could be a square.

We know that it has 4 right angles, and thus ABCD have to be a retangle. We do not have any more information, than we can only conclude that it could be a square.