Which of the following countries has never been under foreign rule? a} djibouti b} eritrea c} somalia d} ethiopia

What would a student most likely use if he or she wanted to consult a secondary source

Whether or not a given study has the possibility of causing harm to participants:

Why are the majority of the world's economies mixed? what may happen to the "pure" types of economies (traditional, socialist/command, market capitalist) when they incorporate elements from other economic models?