问题如下图：
选项：
A. 
B. 
C. 
解释：
请问答案为啥不是B？
NO.PZ2015122802000148 问题如下 Whiof the following instries is most likely to consireto have the lowest barriers to entry? A.Confections ancan. B.Oil services. C.Branpharmaceuticals. is correct.The Confections ancan instry hmeum/low barriers to entryLow financior technologichures, but new players woullathe establishebran thive consumer purchase cisions anpotentisupply chain operations. 原来的答案是oil，也能得通 can被几家大公司垄断，而oil相对来说门槛较低。 当时觉得这个答案很不可思议。现在改成oil了，但又如何『can被几家大公司垄断』呢？总之不同的维度比较结果就不一样，考试时遇到这类问题怎么办？
NO.PZ2015122802000148 问题如下 Whiof the following instries is most likely to consireto have the lowest barriers to entry? A.Confections ancan. B.Oil services. C.Branpharmaceuticals. is correct.The Confections ancan instry hmeum/low barriers to entryLow financior technologichures, but new players woullathe establishebran thive consumer purchase cisions anpotentisupply chain operations.
NO.PZ2015122802000148 问题如下 Whiof the following instries is most likely to consireto have the lowest barriers to entry? A.Confections ancan. B.Oil services. C.Branpharmaceuticals. is correct.The Confections ancan instry hmeum/low barriers to entryLow financior technologichures, but new players woullathe establishebran thive consumer purchase cisions anpotentisupply chain operations. can 投入需要选址 建厂 设备，但是oil服务只要人就可以了，进入成本也低，为什么不能是oil 服务呢？
NO.PZ2015122802000148 问题如下 Whiof the following instries is most likely to consireto have the lowest barriers to entry? A.Confections ancan. B.Oil services. C.Branpharmaceuticals. is correct.The Confections ancan instry hmeum/low barriers to entryLow financior technologichures, but new players woullathe establishebran thive consumer purchase cisions anpotentisupply chain operations. 这个题目答案到底是can还是oil service
NO.PZ2015122802000148问题如下 Whiof the following instries is most likely to consireto have the lowest barriers to entry?A.Oil services.B.Confections ancan.C.Branpharmaceuticals. is correct.The oil services instry hmeum barriers to entry because a company with a high level of technologicinnovation coulobtain a niche market in a specific area of expertise.考点Competitive Analysis这里在问进入门槛，列出的三个中只有油田服务业技术含量最低（买一个钻井就可以开展），不像制药、糖果类需要很高的生产技术，现有市场已经形成垄断（大型制药厂像GSK或糖果类雀巢、太古），新进入者很难立足。因此相比之下油田服务业不能通过专业化经营而取得更多的利润。答案里就是说油田服务业，相比BC来说进入门槛更低，但是拥有更高的技术创新的油田公司能够可以在一些专业领域获得利基市场（通过专业化经营而获取更多的利润）。 基础班课程里面，1.5倍速度，14分讲的，进入标准低的，就是糖果吖。我又专门看了一遍视频。
