I believe it is C, dulled sensory perception. decreased anxiety is another effect, but it's more long term.
Answer: Small, stable population
Explanation: Superpowers tend to have a larger more bulky population compared to their counter-parts with a small more controllable population, (hence, stable.)
Explanation:
Well if you think about it...
Venus is to _____. (hot)
So they can't land on it.
Mars is _____. (Not nerarly as hot)
So they can land on it.
So missions to Mars is way safer.
Hope this helps! Sorry if it was not what you were looking for ...