For the reaction $A + 2B \to C$,the rate equation is given as $\text{Rate} = K[A][B]$. If the concentration of $A$ is kept constant but that of $B$ is doubled,what will happen to the rate of the reaction?

• A
  It is halved
• B
  It remains the same
• C
  It is doubled
• D
  It is quadrupled