Chinko agro-chemical Corporation has invented a liquid which enables seeds to keep nutritional elements unchanged for long period of time. Chinko does not intend to disclose the formula of the invention. What should Chinko do to protect its invention at this stage?

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Keep the formula of the invention secret [d]

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Apply for industrial design protection [b]

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Apply for trademark protection [a]

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Apply for patent protection by indicating clearly in the application that the formula should be kept secret [e]

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Apply for plant variety protection [c]

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Chinko agro-chemical Corporation has invented a liquid which enables seeds to ke...

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