business has been thriving for the past few years. Long .... it continue to do so. A, may B, might C, could D, does

The correct answer is B, might. The sentence should read: "Business has been thriving for the past few years. Long may it continue to do so." The phrase "Long may it continue" is an idiomatic expression that means "I hope it continues" or "May it continue". It's a way of expressing a wish for something to happen or continue. In this case, the speaker is hoping that the business will continue to thrive.