Scientists studied how sucrose moved through a plant. They used carbon dioxide that contained radioactive carbon, $^{14}\text{C}$. A clear plastic bag holding $^{14}\text{CO}_{2}$ was placed over one leaf of the plant. After 24 hours, the plant was put onto photographic film. The film turned black in the places where radioactive carbon had been found. Diagram 1 shows the plant at the beginning of the experiment, while diagram 2 shows the photographic film at the end of the experiment. Which conclusions can be drawn from the experiment?
- A1, 2 and 3
- B1 and 2 only
- C1 and 3 only
- D2 and 3 only