The correct answer is C) several of the lions roar at the sound of the horn.
That is the only correct sentence in which there is a subject-verb agreement.
A isn't correct because it should be - each of the boys has brought...
B isn't correct because it should be - has anyone here seen...
D isn't correct because it should be - everything in the pages of this book makes...
It's probably B, cause and effect
I believe it is the first one im sorry if im wrong