Line and Shape

Q: Which of the images a, b, c, or d are lines?
Q: Which of the images a, b, c, or d, are shapes?
-- A: The only way I feel that I can answer these questions is to answer them at the same time. A, and C could be lines as well as shapes. I only say that because you can make lines that go from being really thin to really thick, especially with a sharpie marker. C could be a rectangle or just a really really thick, short line. B and D are the only two I want to say are only lines.

Q:What makes a line?
A:I think that movement, and mood can make a line.

Q:What makes a shape?
A:I think that form, movement, and mood can make a shape.