Choice "C" is correct. Once the decision has been made to dispose of a component of a business and that component meets the criteria to be classified as held for sale, the operating results of the component for the period reported on, and any gain or loss from the disposal, should be reported separately from continuing operations, net of tax. In this question, the component was classified as held for sale and was sold in the same year. Thus, the results of operations, the $300,000 ($500,000-$800,000) loss, are reported as a loss from discontinued operations. The loss on disposal would be reported as part of that loss from discontinued operations also.
Choice "a" is incorrect. The results of operations prior to the decision date, and also after the decision date, are reported separately from the results of continuing operations as a part of discontinued operations.
Choice "d" is incorrect. The results of operations prior to the decision date, and also after the decision date, are reported separately from the results of continuing operations as a loss from operations of a component and included in loss from discontinued operations.
Choice "b" is incorrect. The results of discontinued operations are not reported as an extraordinary item.