In recent years, global paper prices have continued to rise. According to analysis, the price of pulp will be higher and higher, and for environmental reasons, the global pulp production capacity is weakening. Rising oil prices will make the problem worse, and according to statistics, it is predicted that this upward trend will not be reversed in the short term. When the price of paper rises to a certain level, it will be reflected in the book price. Even if the buyer is not considered to reduce purchases due to additional expenditures, the increased occupation of funds will also make the bookstore an increased operating risk. What is the most accurate summary of the main point of this text? ['Many reasons for the price increase.', 'Forecasting Book Retail Industry Will Face Operational Troubles.', 'Analysis of the development trend of the book retail industry in the future.', 'Reveal the relationship between energy issues and the book industry.']