Answer: C. BTCF is a levered cash flow, while NOI is an unlevered cash flow.
Explanation: Financial leverage in Accounting means the use of debt to buy more assets. When the amount of financial leverage is excessive it increase the risk of failure. The leverage is used to increase the return on equity.
In this case the true statement in regards how before-tax cash flow from operations (BTCF) and net operating income (NOI) account for the use of financial leverage, is that " BTCF is a levered cash flow, while NOI is an unlevered cash flow".