Answer: It was the imaginary line dividing Europe between the Soviet Union and Western influence.
Explanation: This symbolized efforts by the Soviet union to block itself from open contact with the West
The first three options I see are all making-decision process to take action, but the last one is the one that is not like that. Researching is something that is not so close in meaning to what you need. That is why, D is a good option.
Answer:
blind person?
Explanation:
Because a blind person has difficulty with seeing.
