The claim that is not defensible is the increase in Government spending under the Democratic president because there are no facts and figures based on which the argument can be defended. Hence, Option D is the correct statement.
A thesis declaration is defensible if a) an opposing argument/opportunity view can moderately be argued (even though it is the weaker argument) and b) it isn't an apparent reality approximately the content/text.
Hence, Option D is the correct statement that is Government spending increases under a Democratic president.
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