Consider the Following Argument: Marcia's Command Skills Rely on Her

Consider the following argument: Marcia's command skills rely on her ability to get to know what makes people "tick" and thereby communicate well with them; she has to rely on this ability, without which effectively leading people in any manner would not be possible. Which of the following, if true, would strengthen this argument?

A) Marcia can quickly train new employees on company best practices and get them started on their work.
B) Marcia relies on a small group of trusted colleagues to keep abreast of industry best practices.
C) Employees have reported that they feel that Marcia listens well and that she "gets" where they are coming from.
D) Marcia's employees indicate that she tends to not spend much one-on-one time with them personally.
E) Marcia's immediate superior likes to be able to get to know each of Marcia's employees personally.