Which of the following statements about WACC is CORRECT?

	a.	Borrowing money in the form of accounts payable (short term borrowing) is a source of capital that contributes to the cost of capital (WACC).
	b.	The cost of capital (WACC) should reflect the average cost of the various short-term funds a firm borrows.
	c.	All statements are correct.
	d.	Funds borrowed from investors do not include long term bonds.
	e.	The costs of capital for long-term debt, preferred stock, and common stock are market-determined variables in the sense that they are based on investors' required returns.