So,some please help!
2 answers:
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<h3>Option C</h3><h3>The average rate of the reaction over the entire course of the reaction is: 
</h3>
<em><u>Solution:</u></em>
Average rate is the ratio of concentration change to the time taken for the change
The concentration of the reactants changes 1.8 M to 0.6 M
here, the time interval given is 0 to 580 sec
Therefore,
Thus option C is correct