What is the technical debt in the agile project?

	a.	A typical description of a user or group of users about their needs or problems.
	b.	A limited time activity which is allocated to reduce uncertainty by learning about a feature, technology, or process.
	c.	A defect that passes through all QC stages and has been found by the customer.
	d.	The list of works that are generated by not doing the appropriate maintenance, cleanup, and standardization while the product or service is being produced.