All parrots can learn to speak a few words and phrases. Not all parrots have equally pleasant dispositions, though some of those native to Australia can be counted on for a sweet temper. Almost any parrot, however, will show tremendous affection for an owner who raised the bird from a chick by hand-feeding it.

Question: If the statements above are true, then which one of the following must be true?
Options:
A. Some parrots that can learn to speak are sweet tempered.
B. If a parrot is not native to Australia, then it will be sweet tempered only if it is handfed as a chick.
C. The sweetest-tempered parrots are those native to Australia.
D. Australia is the only place where one can find birds that can both learn to speak and be relied on for a sweet temper.
E. All species of pet birds that are native to Australia can be counted on for a sweet temper.
Answer: "A"