Under the current financial constraints, it is not advisable to increase the police force in City A. When calculating the expenditure required to increase the police force, it is not enough to take into account the pay of the additional police officers, but also to pay the court And the salary of new prison employees, due to the increase in the number of arrests, sentencing and supervision tasks caused by the increase in police force, it is bound to require the relevant agencies to increase their staff. Which of the following, if true, would most weaken the argument? ['Although the financial situation is tight, the proportion of the cost of additional police officers in the overall financial expenditure is very small.', 'After increasing a certain police force, the crime rate in city A will be greatly reduced.', 'Last year, City B ’s police force increased by 15%, arrests increased by 37%, and sentencing cases increased by 9.5%.', 'There are other ways to cover some of the costs caused by the additional police force.']