Files whose contents must be handled as sequences of binary digits are called:

A) text files
B) ASCII files
C) binary files
D) output files

Binary Files

Files that contain data in a binary format, which is not directly readable by humans.

Text Files

Files that store data in a form readable as text, including letters, symbols, and numbers, without requiring special interpretation.

ASCII Files

Text files that contain characters encoded using the American Standard Code for Information Interchange, a character encoding standard.