Concept:The short-term memory of a computer is the temporary storage used for currently running programs and data.
Explanation:Random Access Memory is the computer's short-term memory.
It holds only the programs and instructions that the computer is actively using.
When a program is closed, RAM automatically clears that data from memory.
This is why RAM is described as short-term or volatile memory.
The other options are not memory components.
The arithmetic logic unit and control unit are parts of the CPU, not memory.
An arithmetic operator is a symbol used in calculations, not a type of memory.
Thus, RAM is the correct choice.
Answer:D. Random Access Memory (RAM).