Which of the following statements refers to a widely held scientific belief in the 1950s?

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In the 1950s, the prevailing scientific belief was that the brain was relatively inactive during sleep, reflecting a limited understanding of sleep stages and brain activity patterns during different phases of sleep. This view changed significantly with later discoveries, particularly the identification of REM (Rapid Eye Movement) sleep in the 1950s, which is associated with active brain patterns similar to wakefulness and where most dreaming occurs.

Which of the Following Statements Refers to a Widely Held