C correctly states that the system is based on the "import" of produce.
B incorrectly suggests that the system is based on the produce itself. Also, the preposition "of" in B leaves it unclear whether Florida and California were the source or the destination of the import.
B incorrectly suggests that the system is based on the produce itself. Also, the preposition "of" in B leaves it unclear whether Florida and California were the source or the destination of the import.
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