A child walks toward a fixed plane mirror at a speed of \( 5 \mathrm{~km} / \mathrm{h} \). The v...

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A child walks toward a fixed plane mirror at a speed of \( 5 \mathrm{~km} / \mathrm{h} \). The velocity of the image is
(A) \( 5 \mathrm{~km} / \mathrm{h} \)
(B) \( -5 \mathrm{~km} / \mathrm{h} \)
(C) \( 10 \mathrm{~km} / \mathrm{h} \)
(D) \( -10 \mathrm{~km} / \mathrm{h} \)
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