Final answer:
Bohemia and Moravia, historical regions within the Czech Republic, face challenges related to economic stability and environmental issues post-independence, such as industrial pollution necessitating modernization and cleanup of industries for better air and water quality.
Step-by-step explanation:
The challenges that Bohemia and Moravia face include economic stability and environmental issues. The statement that since privatization, small family farms are being put out of business by large, corporate-owned farms could be applicable to many Eastern European countries transitioning to market economies, including the broader transition challenges in Poland. However, it is not a challenge specifically identified for Bohemia and Moravia in the provided information.
Regarding the large ethnic minorities pressuring to break away from the Czech Republic, the description does not seem to apply as there has been no significant movement in Bohemia and Moravia to break away since they are historical regions within the Czech Republic itself. The correct challenges they face, as per the provided information, are that they have been working towards economic stability since becoming part of independent nations (the Czech Republic and Slovakia) and must deal with the repercussions of industrial pollution that needs modernization of industries and cleanup efforts for better air and water quality. Therefore, the correct answer is option B and D.