In the topological space $X=mathbb{R}$ with the usual topology, which of the following subsets of $X$ is both closed and bounded?
The set of all rational numbers in $X$
The set of all real numbers in $X$ that are less than or equal to $1$
Baroque art features strong contrasts, while Rococo art prefers more subtle transitions
Baroque art is generally larger in scale than Rococo art

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