For acceptable order questions, go through the rules and use them to eliminate answers one by one.
Rule 1 eliminates D. Salammbo has to be before Vancouver.
Rule 2 eliminates A and E. Trapezoid has to be before or after both Reciprocity and Vancouver.
Rule 3 eliminates C. Wisteria has to be before or after both Reciprocity and Trapezoid.
B is CORRECT. It violates no rules.
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Ravena says
The answer to this question is A, not B. B violates rule 2.
FounderGraeme Blake says
Have you perhaps posted on the wrong question? Rule 2 says T must be before both S and R or after both. In B, T is after both.