Which of these 3 industries has the highest threat of entry? Industry A: the industry is extremely profitable, but because of large start-up costs it takes about 4 years for firms to recoup their initial investment. Industry B: only a handful of firms are able to do better than break even, and even those are not especially profitable; but because start-up costs are so low, it only takes about 6 months to recoup the initial investment. Industry C: the industry is extremely profitable, but there is strict governmental regulation to protect the environment. Industry A Industry B Industry C They have equal threat of entry