Recommend me a book to readdd no spoilers (basically free points)

Which of these websites would be least likely to provide credible reference material for researching stress?

Which best expresses the irony present in this passage?

Which choice is a major detail from paragraph two? a) the great wall is a large network of several walls and towers. b) the great wall looks like a long wall snaking its way across china. c) the great wall was constructed over hundreds of years beginning in 221 b.c. d) the great wall construction encouraged several independent kingdoms to unite.