I'm not 100000% sure but id have to say Catholicism
Hope i was able to help, ~Kashout kam
because they have many population and many other countries visited the singapore because of the environment, beautiful place and etc..
As a terrestrial planet with a thick nitrogen-oxygen atmosphere, Earth's appearance comes down to the light-scattering effect of our planet's atmosphere and our oceans, which causes blue light to scatter more than other colors because of the shortness of its wavelength.
The biggest doubling time of all the regions/continents in the world has Europe.
Europe is the only continent that has almost 0% population growth (as of 2014), which practically means that with this pace Europe will need an eternity to be able to double its population, so it makes it the continent with the biggest time needed to double it's population.
Answer:
b the answer is b and b only