Write a multi-choice question for the following article, with the given choices and answer: Article: There's no doubt that man is the smartest. But do you know what other animals are smart, too? Dolphins Dolphins are very smart. Most of the "tricks" they're taught to do are actually behavior they would engage in on their own. They love to play, race and generally enjoy their life to the fullest. They speak a language we have yet to completely understand and like all civilized creatures, dolphins' mothers always provide their young children with guidance and possibly, love. Great apes The great ape family primarily consists of gorillas, chimpanzees and orangutans. Their brain chemistry is so similar to humans' that NASA once used chimpanzees in place of astronauts during many dangerous missions. Gorillas have been taught sign language and orangutans exist in complex familial relationships. Elephants Everyone has heard the phrase "an elephant never forgets". Elephants establish long-term friendships, recognizing and remembering their friends years later. If an elephant comes upon a fallen friend, it has even been known to feel sad. Parrots As proved by this list, parrots are very smart. They are also the only animals listed that can actually hold a conversation. Some parrots know hundreds of words by imitating humans. The birds are also capable of remembering words and using them intelligently in response to situations. Options: A Dolphins. B Great apes. C Elephants. D Parrots. Answer: C Elephants. Question:
A:
Which kind of animal has a long-term memory?