RAM (Random Access Memory) is the volatile main memory that temporarily stores data and instructions while programs are running. It provides fast access for the CPU during execution, and its contents are lost when power is switched off. Therefore, the volatile execution memory described in the stem is RAM.
Option A:
Option A is correct because RAM is defined as volatile primary memory used for active processing, storing currently running programs and data for quick CPU access. The description of temporary storage during execution matches RAM precisely.
Option B:
Option B, optical disc, is a secondary storage medium such as CD or DVD that retains data even when power is off and is not suitable for rapid CPU execution.
Option C:
Option C, USB flash drive, is also non-volatile secondary storage used for data transfer and backup rather than active program execution.
Option D:
Option D, magnetic tape, is a sequential access storage used mainly for archival backup and is far too slow to function as primary execution memory.
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