Racial oppression and prejudice, fitting into the cultural normalities and societal standards, finding a job, possibly learning the language which they are not fluent in, etc.
The answer should be A. to maintain low air pollution levels.
Explanation:
Blitzkrieg was too effective for its own good. The huge advancements it made on the USSR meant that it became more difficult to fight them as they needed supplies which were hard to get as they were deep into Russia territory.
The Catholic Churches would often send missionaries, which would go across boundaries and geographical areas to spread Christianity and sometimes even of proselytizing others.(Proselytism is the act of converting to Christianity.)
