C.
While it is not advisable to stop space exploration entirely, the government should prioritize spending on important issues where the benefits may be more tangible.
This is the best thesis.
B, because if you don't have anything to back up the argument then you will not have a steady argument making the "debate" on your side turn into an opinion.
There is none because this is a bad topic
We decided that we would have a party after the premiere, but we were completely unprepared.
