d₁=|log x−log y| transports the ordinary metric by the injective map log. For d₂, positivity and symmetry hold; when an intermediate point differs from both endpoints, d₂(x,z)+d₂(z,y)=x+y+2z≥x+y=d₂(x,y). If it equals an endpoint the triangle inequality is equality. Both are metrics. **A**.
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