Well "We tied a water hose to our slide" is independent and "so that we could make a water slide" is subordinate.
Answer:
The aspect of life that brings the monster sheer joy is the permission granted by his maker for him and his kind to go to South America
C. It is current.
Since global warming changes pretty frequently, currency on this topic would need to be absolutely on-point and within the last 5-10 years. Think of CRAAP for evaluating a source: Currency, Relevance, Authority, Accuracy, and Purpose. Obviously, currency is what’s being addressed in this question - the more current it is, the more credible. Currency = credibility. :)