Why can Evelyn's success be called proof against society's limited thinking?

Because she did not let disability remain a synonym for failure

The governing social idea is that disability should not be confused with inability. Many people initially assumed that Evelyn's hearing loss would prevent her from becoming a successful musician. Her disciplined training, creative use of vibrations and outstanding performances disproved that assumption in a concrete way. Therefore option A is correct: she did not allow disability to become a synonym for failure. Option B is false because she performed publicly and served wide audiences; option C contradicts her musical career; and option D ignores her merit and effort. Her story asks society to replace pity and prejudice with accessibility, respect and opportunity.

This is a Class 9 English question. Chapter: The Sound of Music. Topic: Overcoming physical disabilities (Evelyn Glennie) and the life of Shehnai maestro Ustad Bismillah Khan.