The answer to the question is C
Answer:
C. Varieties of an element that differ only in the number of neutrons are called isotopes.
Explanation:
The Earth is approximately 
old. The solar system formed from giant gas clouds which was a part of the solar nebula.
The surface of soil which demarcates two soils of different geological ages is called a unconformity.
Palesol is the soil that lies between sediments or volcanic deposits. If the paleosol is older they have lithified rock.
Hence, option C is true.
Can someone help me with my questions
You have the year wrong. Japan didn't control any other nation in 1911. Japan first started occupying Chinese soil around 1931, and a full-fledged war between the countries started in 1937.
Throughout World War II, Japan primary controlled the Northeast part of China, though they occupied many areas all along the Eastern coast in the middle. They set up a "puppet" state in the Northeast called Manchuko.
Japan also invaded and occupied Korea. By 1942, they occupied Thailand, Vietnam, Burma, Malaysia, The Phillipinnes, and dozens of other territories in the South Pacific.
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Hope this helps!
I’m guessing b.market failure i’m not 100% sure though. sorry!
