Rate of an Enzyme-Catalysed Reaction as a Function of Varying

Multiple Choice

Rate of an enzyme-catalysed reaction as a function of varying reactant concentration, with the concentration of enzyme constant.
For the enzyme-catalysed reaction shown in the figure, if the initial reactant concentration is 1.0 micromolar, which of these treatments will cause the greatest increase in the rate of the reaction?

A) doubling the activation energy needed
B) cooling the reaction by 10°C
C) doubling the enzyme concentration
D) increasing the concentration of reactants to 10.0 micromolar, while reducing the concentration of enzyme by 1/2