Answer: D) The scientists decide to conduct the experiment.
Explanation: This short story by Mark Twain seeks to expose the loyal and selfless nature that a dog can have towards its masters, and in contrast, the often unconscious and selfish nature of human beings, because, in the end, the scientists decide to continue his experiment; It is worth noting the value of the story which is taken by an animal protection organization to expose the cruelty of experimentation.