Your Text Describes a Study in Which Researchers Played Recordings

Your text describes a study in which researchers played recordings of normal or backward speech to two-day-old babies. The researchers then measured blood flow in the babies' brains. Which of the following alternatives correctly names and labels the variables in this study?

A) experimental variable-normal or backward speech ; control variable-blood flow
B) experimental variable-blood flow ; control variable-normal or backward speech
C) independent variable-normal or backward speech; dependent variable-blood flow
D) independent variable-blood flow; dependent variable-normal or backward speech

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