Which of the following is true?

	a.	CPI adjustments shift the risk of unexpected inflation is shifted to the lessor
	b.	Expense stops shift the risk of increases in expenses to the lessee while allowing the lessee to retain the benefit of any decrease in expenses
	c.	The use of a CPI index in lease contracts shifts risk to the lessee
	d.	Expense stops protect the lessee from unexpected changes in market rents