Parent State ID: 0
State Depth: 1
Action Taken: unstack(d, c)
Action Reasoning: To achieve the goal of having block C on block A, we first need to clear block C by removing block D. The best action is to unstack block D from block C.
State Description: Block a is on block b, block c is on the table, and block d is held in the hand. Blocks a and c are clear. The hand is not empty.
Action Path: ['unstack(d, c)']
