Why will biometrics never fully replace the traditional password protection as a method of security?

	a.	There is not enough uniqueness to using biometrics to be secure.
	b.	Biometric signatures take up too much room in databases and are difficult to maintain and manage.
	c.	If a person's biometric signature does happen to become compromised,there is no easy way to change a person's biometric signature.
	d.	Biometric signatures have been found to be very unreliable in practice.
	e.	Biometric signatures can be easily copied.