If $R$ is the set of all real numbers,what do the Cartesian products $R \times R$ and $R \times R \times R$ represent?
- A$R \times R$ represents the set of all points in a line and $R \times R \times R$ represents the set of all points in a plane.
- B$R \times R$ represents the set of all points in a plane and $R \times R \times R$ represents the set of all points in three-dimensional space.
- C$R \times R$ represents the set of all points in three-dimensional space and $R \times R \times R$ represents the set of all points in a plane.
- D$R \times R$ represents the set of all points in a line and $R \times R \times R$ represents the set of all points in three-dimensional space.
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