In the 1800's German immigrants took their tradition of the modern Christmas tree with them to Great Britain, however the trend of using a Christmas tree as we use it
today did not catch on with local residents. It wasn't until Queen Victoria and her
German husband Albert

were sketched for a British news source in 1846 that the
custom of using a Christmas tree became popular in Great Britain.
This passage details how the German style of Christmas trees became popularized
in Great Britain. The story provides a description of what cultural phenomenon?
a Remittances
b Diffusion
c Distribution
d Net Migration