The correct answer is: A. keeps on fluctuating from time to time.
Temporary working capital is the difference between current assets and current liabilities. Current assets are assets that are expected to be converted into cash within one year, while current liabilities are liabilities that are due within one year. The amount of temporary working capital will fluctuate from time to time, depending on the level of sales and the amount of inventory and accounts receivable.
Option B is incorrect because the amount of temporary working capital does not remain constant for all times.
Option C is incorrect because temporary working capital is not financed through long-term services.
Option D is incorrect because A is the correct answer.