The correct answer among all the other choices is D. The sentence is correct as it is written. The sentence doesn't need to be revised. Thank you for posting your question. I hope this answer helped you. Let me know if you need more help.
<span>The answer is the option A. Those who perform the best. Meritocracy comes from merit and cratia (merit rules); it means that in the ideal meritocracy the individuals with greatest merits (best performance) will be rewarded with the highest positions, responsibilities and salaries.</span><span />
