The answer is A the eastward expansion of Russia under Catherine the great. Let me know if you get it right...
Your diary entry might include ideas about how your work in the factory is dangerous or how you work for more hours than expected and get paid almost nothing. Also make sure to include how you joined a union and how you had a strike together to protest asking for better working conditions and higher wages.
Your answer would be C since homeland defense is there to provide protection for the President with terrorism and dangerous crimes.