Which of the following has negatively affected Africa's economies? O A. The lack of quality health care in Africa. B. The presence of nongovernmental organizations in Africa. C. The collaboration among different organizations such as the African Unior D. The monetary investment into Africa by foreign nations. answered

In a study, people were asked to imagine simple occasions that made them happy and to remember events that made them feel proud about themselves. it was observed that the subjects developed an increasingly positive attitude. these changes are known to be healthy, leading to greater physical activity and reducing unhealthy habits. based on this excerpt, we can conclude that a positive attitude .