Classify the following into open and closed curves. (a) (p) (b) (q) (c) (r)

• A. Open Closed (b, p, r) (a, c, q)
• B. Open Closed (b, q, c) (a, p, r)
• C. Open Closed (p, q, a) (r, c, b)
• D. Open Closed (r, b, a) (p, q, c)