Which statement is true regarding working capital?

The statement about working capital being a measure of a company's liquidity is accurate because working capital quantifies the difference between current assets and current liabilities. This measurement indicates how well a company can cover its short-term obligations using its short-term assets. High working capital suggests that a company has sufficient assets to manage its day-to-day operations without running into liquidity issues, while low working capital can indicate potential difficulties in meeting ongoing expenses.

In contrast, the other statements do not accurately characterize working capital. For instance, working capital is primarily focused on short-term financial health and operation, not long-term health. Additionally, it does not include fixed assets, which are considered long-term assets. Lastly, working capital certainly influences operational efficiency, as it directly affects a company's ability to fund its operations and manage its cash flow effectively.