The internment camp at Manzanar was built three months after Pearl Harbor in the California desert.
Answer: C
Explanation
Manzanar has become now an important site in the pages of History.
In the present day, it stands as a memorial for the remembrance of two events- the signing of Executive order by President Roosevelt and the brutal imprisonment of Japanese Americans after bombing of Pearl Harbor during World War II.
Around 10 camps were set in this region.
It was established as a historic site in 1992.