Which of the following best describes a computer's memory?

A computer's memory is primarily characterized by its ability to hold data temporarily, which enables rapid access by the CPU (Central Processing Unit). This type of memory is often referred to as RAM (Random Access Memory).

When the CPU processes data, it needs quick access to this information, and memory provides a much faster way to retrieve it compared to permanent storage devices like hard drives or SSDs. While RAM is typically cleared when the computer is turned off, it plays a crucial role in enabling applications to function efficiently during use.

The other options inaccurately define the scope and function of computer memory. For instance, while some memory may store software applications, it is not exclusive to that purpose. Similarly, memory is not a permanent storage solution, nor does it restrict itself to only holding user-installed applications and data. Thus, option B accurately captures the essential nature of a computer's memory.