I would say B!
Let me know if it’s right!
Answer: The journal of someone who was there at the time.
Explanation: The journal of a person who was present at the fall of the Berlin wall would be a perfect source, or footage of the event, or anything first-person. People who were actually there and participated are always the best sources for any historical event. (:
In the second sentence, the adjective is delighted. In the third sentence, the adjective is large. The first sentence doesn't contain an adjective.
Noun plural:
A representation or image especially sculptured as a monument!
Happy to assist you!