Politician: Homelessness is a serious social problem, but further government spending to provide low-income housing is not the cure for homelessness. The most cursory glance at the real-estate section of any major newspaper is enough to show that there is no lack of housing units available to rent. So the frequent claim that people are homeless because of a lack of available housing is wrong. That homelessness is a serious social problem figures in the argument in which one of the following ways? ['It summarizes a position the argument as a whole is directed toward discrediting.', 'It is compatible either with accepting the conclusion or with denying it.', 'It is required in order to establish the conclusion.', 'It sets out a problem the argument is designed to resolve.']