Which of the following is a performance obligation?

	a.	Lil Pharma receives a donation in return for settling a liability owed to a municipality.
	b.	Nokia Electronics promises to make repairs if a product will become defective within a week of purchase.
	c.	Fancier Phones provides assurance that its phones will work after purchase.
	d.	Acacia Flowers provides assurance that its flowers will stay fresh for two days.
	e.	Steve Electronics assurance at an affordable price that provides additional protection after the customer takes possession of the product.