Hi!
Your answer is C.
A is an example because it's not good to only make identify one solution; you need backups or a variety of ways.
B is an example because, hey, not everything is true! Especially on the internet. Questioning source information is great because then you are sure what you are seeing is unbiased and accurate.
C is NOT an example. As stated above, you need a variety of solutions, but you can't just pick the first solution; you want to pick the <em>best</em> solution for the problem at hand.
D is an example. As stated above, questioning source information is great, but then you need to also verify it, because, like said before, not everything is true.
I can see 3 main groups:
The poor - they have a promise of a “reward” in heaven if they obey Church and King.
The Church and King - it provided them with great temporal power. Ever hear of the Divine Right of Kings?
Those people that Xtian armies or “missionaries” held at sword point and gave them the choice of convert or die.