I'm afraid this painting is not by Picasso. It's only a copy and so it's .A. priceles

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A. priceless
B. invaluable
C. unworthy
(答案→)D. worthless
解析：考查词义辨析。worthless 无价值的, 无用的。Priceless 无价的, 贵重的, 无法估价的。Invaluable 无法估价的, 非常宝贵的。Unworthy 不值得的, 不配的; 无价值的。