If v is the displacement in y-direction, the linear strain component in is defined by __________

• A. \(ε_Y=\frac{∂v}{∂y}\)
• B. \(ε_Y=\frac{∂y}{∂v}\)
• C. \(ε_Y=\frac{dy}{dv}\)
• D. εY=v+y