Sierra, an Intern, Is Well-Liked by Everyone in the Office

Sierra, an intern, is well-liked by everyone in the office. She has seemingly boundless energy, asks a lot of questions, and is self-confident without being arrogant. Her supervisor, John, is discussing her time at the company with his colleague Maxine. He predicts that

A) Sierra is a natural-born cooperator, rather than a leader.
B) Sierra's personality has no bearing on her leadership abilities.
C) Sierra's personality means she is likely to emerge as a leader.
D) Sierra is too nice and therefore unlikely to be an effective leader.
E) Sierra's personality means she is likely to become an effective leader.