The response is b
I hope this is helpful to you!
From what I gathered, Bradstreet led a somewhat privileged life in England, whereas John Berryman was named in respect to Mistress Bradstreet. That’s the extent of my knowledge, and I hope this information provides some insight or hints for you.
Every one of the visitors HAD attended the concert held in the park.
(However, I believe it could also be have, if you are referring to it in the present context).
