What is the digit range in the binary number system?

In the binary number system, the digit range consists of only two values: 0 and 1. This system is foundational in computing and digital circuits, as it represents the two states of binary logic—off (0) and on (1). Therefore, the correct answer is that the binary system operates within the range of 1 and 2 as it utilizes those two digits exclusively. The other options reflect number ranges that are applicable to different counting systems, such as decimal (which spans 0-9) or hexadecimal (which includes digits up to a base of 16). Understanding the limited range of digits in binary is crucial for grasping how data is represented and processed in electronic systems.