(A)
- Stack with red block
- Stack with orange block, blue block, green block, from bottom to top

(B)
- Stack with yellow block
- Stack with green block
- Stack with purple block, orange block, blue block, from bottom to top

(C)
- Stack with yellow block
- Stack with green block
- Stack with orange block
- Stack with purple block
- Stack with red block

(D)
- Stack with yellow block, orange block, purple block, blue block, green block, from bottom to top