When did Randall L. Stephenson serve as CEO of AT&T ?
2005-2015
2007-2020
2010-2020
2000-2010
Answer
Randall L. Stephenson served as the CEO of AT&T from May 9, 2007, to June 30, 2020. He played a significant role in shaping the company's growth and direction during his tenure.
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