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Let $A = \{x:x \in \mathbb R, x^2 - 4\geq 0\}$ and $B = \{y:y \in \mathbb R - \{0\}, 4y^2 - 1 \leq 0\}$.

Also, denote $|X|$ as the cardinality of the set $X$, then which of the statements is true?

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