Answer:
A. Out-of-touch with worldly news.
Explanation:
A. Out-of-touch with worldly news
This is because Peter has not been reading news, leading to him having know idea with what is going on in the world, and what it had to do with his country.
Why the other answers are wrong:
B - The author only brings up this "conflict" for a brief moment, while mainly focusing on the fact that their were BIGGER quarrels happening outside of Peter's country that he didn't know about.
C - The author does not say anything about the 4th of July
D - The author states "half a dozen mighty nations were locked together in a grip of death" suggesting the exact opposite of peace and prosperity.
Therefore the answer is A.