The following figure shows Arrhenius plots for four different reactions.Which reaction has the lowest activation energy? 
Definitions:
Profitability Index
A financial metric that calculates the relative profitability of an investment by dividing the present value of future cash flows by the initial investment cost.
Required Rate
The minimum return an investor expects to achieve by investing in a particular asset, often used in capital budgeting.
Profitability Index
A ratio that compares the present value of future cash flows generated by an investment to the investment's initial cost, indicating its relative profitability.
Required Rate Of Return
The minimum annual percentage return an investor expects to achieve from an investment.
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