For letter A, they were fooling us with the apostrophe. But, her's is not a real word as I remember from school. It wouldn't be C either because If you replaced it with hers, it would not sound right and wouldn't be proper grammar. Now I am not sure why you have to answers, for it is B. Hers and D. Correct. But reading from the instructions, it would be D. Correct.
I believe they are common because people believe that is where we could be headed. Will we run society into the ground, or will we prosper? Will the society be a "Divergent" or "Giver" society or will it exist as it does today? Since we have no way of knowing, we pretend we do.
