The answer is the last one D.
The correct option is D.
From the passage given above, it can be seen that the author is implying that compulsory voting was implemented in Australian a long time ago and it has has been very successful and that the same method should be used when it comes to voting in America.
The word 'mother' should be capitalised in place of someone's name. However, since you have already mentioned that she is called 'Sonya', the word 'mother' should not be capitalised.
You must walk in the halls, not run, you can get seriously hurt. You can trip and scar up your knees, you can tumble and fall, and hit your behind. hope this helps :)