A reaction \[2A\to \] products is found to follow zero oder kinetics, then

• A.                 \[\frac{dx}{dt}=k{{[A]}^{2}}\]    
• B.                 \[\frac{dx}{dt}=k{{[A]}^{0}}\]
• C.                 \[\frac{dx}{dt}=k[A]\]   
• D.                 \[\frac{dx}{dt}=k[2A]\]