A principal difference between a red ocean and a blue ocean is:

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সঠিক উত্তর: । ব্যাখ্যা: The passage emphasizes that a blue ocean strategy focuses on "value innovation" and finding unmet customer needs, rather than competing solely on superior quality (which is often a red ocean strategy). The passage states that blue oceans can be created in **any** industry (not a limited number), and brands **are** built in blue oceans.