We had hoped they had sent us an invitation too.
C.
since it does not use proper punctuation to combine to thoughts
D. Mrs. Mallard had loved her husband, but she is happy that she is free.
I think this is accurate, and out of the options it looks like the best choice, but I am not certain.
Answer:
means everyone would pay the same income percentage in taxes
Explanation:
Americans believe a flat rate would be fair overall so it doesn't seem like the rich are getting richer and the poor and getting poorer.