Correct Answer: (C)
The clue to the correct answer is in the first clause: "because she was able to read at such an early age." We know that the child is unusually advanced for her age, so we need to find a word that means the same thing as "very smart." The correct answer is (C) because "precocious" means "unusually advanced" or "talented at an early age." The other choices are all words that parents might call their children, but none of them will fit in this sentence since we know the parents describe their daughter based on her ability to read when she was so young.
