The shearing strain component in X-Y plane is ________

• A. ( _{xy}= frac{ v}{ x}+ frac{ u}{ y} )
• B. ( _{xy}= frac{ v}{ x}- frac{ u}{ y} )
• C. ( _{xy}= frac{ v}{ y}+ frac{ u}{ x} )
• D. ( _{xy}= frac{ v}{ y}- frac{ u}{ x} )