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If Sarah were a concert pianist for a major orchestra, she would be famous. She is not a concert pianist since she is not famous.
The conclusion above is unsound because the author does not consider that
(A) Sarah could be a famous actress.
(B) Sarah could be a violinist for a major orchestra.
(C) Sarah could be a pianist with a rock group.
(D) Sarah could be a concert pianist with a minor orchestra.
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