It can be inferred that text from "About Russell" that best supports the inference that the author's mother was aware of Russell's condition is: "he never asked us for anything, nor did he go about begging other people for money." (Option B).
Russell was a shy little child who was fascinated by math and science. Rita and Rosalind, his elder sisters, were his sole pals. He grew more sociable in high school, joining the cross-country team and making new acquaintances.
Later, after graduating from high school, he is denied admission to MIT, his dream school. He then decides that college isn't for him, so he quits out and begins picking cans from garbage and dumpsters for nickels. Rita, Russell's older sister, appears to be the only one concerned about him.
An inference is a reasonable conclusion or justification based on the facts supplied. In particular, an inference is a logical rule that is frequently used as evidence. When a fact is established or "proven" by evaluating other "facts," or rather works, judgment is utilized to allow another fact or reasonable inference to be reached.
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