Explanation
According to the PMBOK Guide, a project manager should use communication methods that are appropriate for the project context and stakeholder needs. Videoconferencing is a communication method that allows real-time, synchronous, and visual interaction among distributed teams. Videoconferencing can help improve team collaboration, engagement, trust, and understanding, as well as reduce communication barriers and misunderstandings. Videoconferencing is the best option for project teams that are involved in a global program, as it can facilitate cross-cultural communication, knowledge sharing, and decision making. Chat conversations, encrypted emails, and phone conversations are not the best options, as they do not provide the same level of interaction, feedback, and clarity as videoconferencing. References: PMBOK Guide, 7th edition, page 191-192, 195-196.