g, h, and i are consecutive integers in increasing order. If p = g/4 - h/5 and q = h/4 - i/5, then q - p equals:
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radio_button_unchecked(A) 1/40
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radio_button_unchecked(B) 1/20
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radio_button_unchecked(C) 1/10
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radio_button_unchecked(D) 1/5
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radio_button_unchecked(E) 1/4