The answer is panic disorder. This is a nervousness issue portrayed by reoccurring unexpected fits of anxiety. These attacks are sudden times of extreme dread that may incorporate palpitations, sweating, shaking, shortness of breath, deadness, or an inclination that something extremely terrible will happen.
Answer: Political scientist
Explanation:
Political scientist is the person who studies beginning, development, trend and function of any political system as a finding or research.This study is based on studying political regulation, operations, government policies,political history etc.
According to the question, David should contact political scientist for gaining information about highest expected age-group to vote in election as per their analyzation and study of political system or field and trend.
Answer:
The present general secretary of UNO is Antonio Guterres
I think B, I am not sure.