?Document properties are user-defined details about a file that describe its contents and origin.

________ is a program that attaches itself to another program and tries to spread itself to other computers when exchanging files

A) A Trojan horse B) A worm C) Spam D) A virus

What kind of linked list begins with a pointer to the first node, and each node contains a pointer to the next node, and the pointer in the last node points back to the first node?

a. Circular, singly-linked list. b. Circular, doubly-linked list. c. Singly-linked list. d. Doubly-linked list.