n the children's novel by Christopher Curtis, "Bud, Not Buddy" Herman E. Calloway and Bud are coming home from a gig and Bud shows Calloway his rocks with dates marked on them. Calloway gets very upset and blames Bud for stealing the rocks
"We noticed the CAMPING club had set up their tents nearby" This is the answer because in the other sentences it is being used solely as a verb. Where as in the first sentence it is being used as a noun for the the club.
The main difference is that historical fiction is that it has a fictional (fake) element but has the main historical theme present. True historical has all of the correct details, characters, plot etc, no fiction involved