The statement "Hans and his mother put a lamp in front of the window to make themselves feel better" best describes and explains the characters’ actions. So, the correct option is A.
The central idea of the black day 1935 refers to a remarkably fierce dust storm in the USA on 14 April 1935 and the day was Sunday. It drastically covers the USA as a bowl of dust.
In the excerpt given above, the character's actions are determined by their arrangement of a lamp on the window that makes them free from fear and feels safe.
Therefore, the correct option for this question is A.
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