The right answer is D, convoys were used to prevent submarine attacks on ships
A convoy is a group of motor vehicles or ships, traveling together for mutual support and protection. A convoy is usually organized with armed defensive support. Moreover, they often travel with a naval escort
Its main role in World War I was to protect cargo ships and unarmed troop transports from submarine attacks.
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Explanation:
B. Korea remains a divided country.
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Answer:
D. 4.5 billion years
Explanation:
Scientists study meteorites to determine the age of our solar system, since they are the oldest accessible material out there. Earth itself has rocks that are over 4 billion years old.
In recent times, meteorites have informed our view of, and our priorities about, what spacecraft – and perhaps, one day, human explorers – might find on Mars and other planets. And we now recognize that a cosmic delivery of life with an independent origin from our own would revolutionize our ideas about the extent of life throughout the whole known Universe.
Answer:
The economics boomed and went through a good recovery.
Explanation:
