When was Evelyn's hearing problem seriously noticed?

Correct answer: At about the age of eight

The governing concept is recalling the chronological development of Evelyn Glennie's hearing difficulty. Her hearing loss was not identified immediately at birth; it became noticeable when she was about eight years old, and it later grew more serious during her school years. This timeline is important because it shows that she had begun engaging with music before the full extent of her deafness was understood. Option A is correct. Option B places the discovery too late, C contradicts the account because the problem was not noticed immediately after birth, and D gives no accurate age or event from the lesson.