The correct answer is: D. digital
A digital fingerprint is a unique identifier that is created by converting a fingerprint into a digital format. This can be done by scanning the fingerprint with a scanner or by taking a picture of it with a digital camera. Once the fingerprint has been digitized, it can be stored on a computer or other device.
Digital fingerprints are often used for security purposes. For example, they can be used to unlock a computer or to access a secure website. They can also be used to identify people in criminal investigations.
Hard print is a type of printing that uses ink to create a physical image on paper. Soft print is a type of printing that uses a laser or other electronic device to create an image on a computer screen. Voice print is a recording of a person’s voice that is used to identify them.
None of the above options are as secure as a digital fingerprint.