John Jewkes (1930) outlined the economic factors bearing on industrial vertical integration. Which of the following statements are inconsistent with his analysis? a. During stable, competitive market conditions, there is little, if any advantage to vertical integration b. Technical imbalance among various production activities typically makes vertical integration more attractive and effective c. Manufacturers who find their access to markets or raw materials threatened by monopolists may seek to protect themselves by expansion into those areas, even at some cost in efficiency d. A monopolist who fully controls one link of the production chain can often dictate or influence conditions on adjacent links without entering those markets. e. None of the statements is inconsistent with Jewkes' analysis.