The correct answer is b. The James Madison Memorial Building, built in 1981, houses the Folger Shakespeare Library
In this case, it is correctly used because the "built in 1981" is an apposition separated with commas.
MLA Style says numbers that can be written in one or two words (three, fifteen, seventy-six, one thousand, twelve billion) and to use numerals for other numbers (2¾; 584; 1,001; 25,000,000). APA Style, uses words for numbers below 10 and numerals for numbers 10 and above.
The title of Oscar Wilde's most successful play. The Importance of Being Earnest features a salient pun in the form of the word "Earnest<span>",
Earnest means </span><span>"<span>honest", and "truthful"
</span></span>At the very beginning of the play, we learn that Jack has created a convenient younger brother named Ernest. We don't know why he comes up with that particular name, but we’re guessing Jack had a laugh or two over it. Jack, Ernest,<span> fools his lady friends, all of whom have an obsession with the name "Ernest." Both Gwendolen and Cecily are in love with that name, based on an assumption that boys named Ernest will be as honest as the name suggests.
</span>
Hope this helps!