What can you use in your writing to evoke a better sense of mood?
a. appropriate comparison
b. plot contrivances
c. historical accuracy
d. an anticlimax

A would be correct. Think about it; plot contrivances are of the mistaken identity type, so they wouldn't help the mood. Historical accuracy wouldn't either, because its just who was where when. Anticlimax is basically a disappointing end to a story, and trust me, those definitely don't improve the mood. Appropriate comparison makes the most sense.

I hope this is right. 

the answer is: tabard inn, southwark.

in "the canterbury tales," by geoffrey chaucer, the twenty-nine diverse group of pilgrims is staying at a tavern in southwark, london, as they are traveling to canterbury. they wish to visit the relics of saint thomas becket in canterbury   cathedral in order to him for his when they underwent necessities.