A graph with reaction progression on the horizontal axis and free energy on the vertical axis. 2 curves are shown. Curve A starts near the middle of the axis, runs straight for a distance, then peaks sharply and falls to level out near the horizontal axis. Curve B starts with curve A, but rises much less sharply to a much lower peak before falling with A to level off.

Which line indicates a higher reaction rate?
A because it has a lower activation energy.
B because it has a lower activation energy.
A because its is much lower.
B because its is much lower.