Most people know that certain animals can be very, very smart. Dogs can be trained to obey commands and recognize situations. Dolphins and whales help each other out and get sad when bad things happen to their friends. Orangutans can interact with humans and even recognize themselves in a mirror (very rare among non-human animals). But did you know that certain birds show signs of high intelligence as well? One famous example was Alex the African grey parrot. Alex was sold as a pet to a scientist named Irene Pepperberg. Dr. Pepperberg decided that she wanted to teach Alex how to speak English words. Since most African greys can speak a little bit, this is not unusual. What made Alex special was what his words revealed about his mind. Alex understood how to add up small numbers. He could look at very different examples of the same items—such as a large brass key and a small silver key—and correctly label both of them keys. He showed empathy with Dr. Pepperberg, telling her “I’m sorry” when she seemed frustrated or sad. He even created new words, such as when he saw an apple for the first time and called it a “banerry”—a combination of “banana” and “cherry,” two words he already knew. Unfortunately, Alex passed away unexpectedly when he was 31 years old. Most African greys live to be around 60. While Dr. Pepperberg continues to work with parrots, none of them have ever proven to be quite as clever as Alex. Some skeptics say this is evidence that birds are not so smart after all, or that Dr. Pepperberg’s research with Alex was flawed. Whatever the reason, it is clear that Alex was a special bird. Maybe one day science will find another bird like him, and we will see just how intelligent birds can be. "Alex (parrot)." Wikipedia, The Free Encyclopedia.29 Jul. 2017. Web. Retrieved 31 Jul. 2017. Submit Which of the following statements about Dr. Pepperberg is true, according to the passage? A She is a veterinarian (animal doctor). B She is a scientist at Oxford University. C She works with many birds, not just A