Its C Their because their is the only option refering correctly to the sentence. Read the sentence out loud with option C and you will "C" that it is correct lol
A children need to learn among them selfs and they should study at there room and do not turn on there tv learn in your room peace and quite.
They should rely on examples and pictureds
Look at how the character change or grow
Hope this helps :D
Its historical significance of this is that real people died during this time