Studies of memory consolidation have shown that information learned before a period of sleep is typically retained more reliably than information learned before an equivalent period of waking activity. Naps as short as 90 minutes can produce measurable benefits, and different sleep stages appear to support different types of memory — slow-wave sleep aiding factual recall, REM sleep aiding procedural and emotional memory.
Which choice most logically completes the text? The passage suggests that sleep's role in memory _______
- A
is unrelated to the duration of sleep
- Bcheck_circle
involves multiple processes that may differentially support distinct kinds of learning
- C
operates only in extended overnight sleep periods
- D
is a single, undifferentiated process common to all types of information
Explanation
Different sleep stages aiding different memory types supports B. A, C, D contradict the passage.