Respuesta :
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.
In this case, it is correctly used because the "built in 1981" is an apposition separated with commas.
The James Madison Memorial Building, built in 1981, houses the Folger Shakespeare Library.