Consider an enzymatic reaction in which the initial concentration of substrate is low. If the amount of enzyme is held constant, but the amount of substrate is increased, the rate of an enzyme catalyzed reaction will
a. stay the same
b. decrease at first, then increase in a linear fashion.
c. be inhibited by the higher concentrations of substrate.
d. increase at first in a linear fashion, then remain at a constant high rate.
e. increase in an exponential fashion.