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The workers' association of the North Western Train Lines Co. has decided to declare a strike unless all its members receive an immediate salary raise of 15% percent. This did not deter the chairperson of the board, who was quoted saying: "The chances of a strike remain slim. This is the third time in as many years that the worker's association has threatened to go on strike if we don't increase their wages, yet we haven't had a strike on that matter in half a decade."
Which of the following, if true, most strongly supports the chairperson's conclusion?
Since the conclusion revolves around the chances of a strike over demands for an increase in pay, a strike held over a refusal to cancel a pay cut is irrelevant and therefore neither strengthens nor weakens the conclusion.
This statement neither weakens nor strengthens the conclusion. The fact that strikes are more common elsewhere does not mean that there are no strikes in the USA at all, and that the workers' association's threat to strike will not be realized.
This answer choice strengthens the chairperson's conclusion by adding information that may explain why the workers are unlikely to strike. According to this answer choice, this year, workers have even less motivation to strike, since the board has decided to grant the workers some of their wishes (a 5% raise).
This answer choice neither weakens nor strengthens the conclusion. The number of employees is irrelevant to the chairman's conclusion as the strike deals with a pay raise across the organization, regardless of the number of employees.
This answer choice weakens the chairperson's conclusion because it provides a case where the workers were true to their word and went on strike for a salary raise.