Step 1: Observe the final motif.
The motif has symmetric diagonal curves converging at the center, mirrored across both diagonals of the square.
Step 2: Check folding mechanism.
Folding overlays the broken curves onto other quadrants, producing the final symmetric figure.
Step 3: Compare options.
- (A): Produces diagonal symmetry but not full set of curves.
- (B): When folded, all curved arcs overlap perfectly to form the final star-like motif.
- (C): Produces misaligned lines, not matching the motif.
- (D): Gives only partial coverage of the motif.
Step 4: Conclude.
The correct choice is option (B).
Final Answer:
\[
\boxed{\text{B}}
\]