Let x, y be the coordinates in the physical domain and ξ, η be the coordinates in the computational domain. In which of these cases, the horizontal lines are stretched and the vertical lines are equally spaced?

• A. ξ=x; η=ln⁡(y+1)
• B. ξ=ln⁡(x+1); η=y
• C. ξ=x; η=y
• D. ξ=ln⁡(x+1); η=ln⁡(y+1)