<p>My aunt has been working at a local department store most of her adult life.</p>
<p>(A) My aunt has been working at a local department store most of her adult life.
(B) My aunt is working at a local department store most of her adult life.
(C) Having worked for most of her adult life there, my aunt is at a local department store.
(D) Most of her adult life is when my aunt has been working at a local department store.
(E) A local department store was where my aunt has been working for most of her adult life.</p>
<p>The answer key says that the answer is (A), but why doesn’t it say “FOR most of her adult life?”</p>
<p>Thanks in advance!</p>