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

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

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

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