Which of these statements is the most accurate description of a liquidity trap?

	a.	Lenders are willing to lend, but borrowers borrow too much due to increased optimism about the future.
	b.	Borrowers are willing to borrow, and expansionary policy is used to stimulate the economy as needed.
	c.	Lenders are willing to lend, but high interest rates keep borrowing slightly lower than needed.
	d.	Borrowers are unwilling to borrow, and lenders are unwilling to lend due to pessimism about the future.