During project execution, the project manager received a call from one of her team members based in another country. The team member had called to file a complaint against another team member who had made fun of her accent during a conference call. She had been extremely offended, particularly when everyone else in the other office laughed. What had the project manager failed to do?

A. Sit in on all of the conference calls that included team members from different offices B. Warn all of the team members about the jokester’s personality C. Provide all of the team members with diversity training D. Request that the teams communicate in writing, as opposed to conference calls