For acceptable order questions, go through the rules and use them to eliminate answers one by one.
Rule 1 eliminates C. T and R are summarized, so they can’t go together.
Rule 2 eliminates D. N is not summarized, so R should have been summarized.
Rule 3 eliminates B. N has to be earlier than T.
Rule 4 eliminates E. F has to be earlier than O.
A is CORRECT. It violates no rules.
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