Net book value of assets produces a misleading increase in return on investment because ______________.

	a.	investment centres with old assets will show a higher return on investment than centres with new assets
	b.	investment centres with old assets will show a lower return on investment than investment centres with new assets
	c.	investment centres with old assets will show an equal return on investment centres with new assets
	d.	book value reflects changing market values
	e.	None of the answers.