user_prompt: ## Instruction:
  Upon entering the room, there is a left hall and one to the right. The left hall contains a cube slot, while the right hall leads to a button linked with a cube machine that produces a cube. Further ahead, there is a big hall with a platform on the left wall that can be elevated to reach a button at mid-height. Additionally, there is a button high up on the roof.
  The cube is in the cube slot, which elevates the platform to the button at mid-height.
  Pressing the button at mid-height activates the red beam that allows hovering over the rift.
  
  Below is a candidate solution:
  Step 1: Press button on the right.
  Step 2: Collect cube with a portal from the roof.
  Step 3: Place a portal right on top of cube switch.
  Step 4: Place cube close to the platform.
  Step 5: Stand on platform and shoot second portal under the cube so that it falls into the cube switch and platform where protagonist stands on lifts off.
  Step 6: Press button that is reached with elevated platform (activates gravitation beam).
  Step 7: Make portal close to the roof to press the topmost button on the roof (left close to entrance). This opens the final door.
  Step 8: Make a portal on the white wall on the right that points to the exit door and let the beam push you from behind over the cliff to the exit.
  Step 9: Exit the beam at the end of the room and go through the final door. Problem solved.
  
  Please choose from the following options. Your response should end with "The final answer is [answer]." where the [answer] is the choice of A or B.
  A. Correct
  B. InCorrect