When Digital Photographs Containing Child Pornography Are Found on a Home

When digital photographs containing child pornography are found on a home computer, investigators can assert that:

A) Someone in the house transferred the photographs onto the computer from a disk or the Internet.
B) Someone in the house took the photographs with a digital camera and transferred them directly onto the computer.
C) Someone gained unauthorized access to the computer via the Internet and transferred the photographs onto the computer.
D) None of the above.