People who claim that the plant is conscious and emotional often use the American Baxter experiment. Baxter connected a polygraph to the leaves of a pot of plants. The design principle of this polygraph is that people are lying At that time, due to tension, the skin will sweat, resulting in a decrease in skin resistance. By measuring changes in skin resistance, you can discern other people's emotions, and then determine whether a person is lying. Baxter reported that when the main test in the experiment thought "I want to burn off When the "leaf", the polygraph responded violently, the pointer suddenly moved to the top of the meter and showed continuous fierce fluctuations, and the polygraph drew a pattern similar to that that would appear when people were in extreme fear. Baxter claimed from this: Plants are emotional. Which of the following, if true, would best refute the above point? ["Even Baxter cannot repeat the experiment steadily, and Baxter's explanation of the success and failure of the experiment is unconvincing.", 'A creature with a central nervous system is conscious, emotional, and the plant does not have any nervous system.', 'Polygraph curves recorded by Baxter may be caused by other factors, including static electricity, mechanical vibration in the room, changes in humidity, etc.', "Baxter's experimental design is not scientific enough, there is no control group, and it does not meet the necessary conditions for the objective, double-blind scientific experiments."]