Which of the following is not a type of communication channel?

Guilles is a school administrator. he is talking to board members about the need for five more teachers to be added to the faculty in the next two years. he showed the board a prospective budget and tried to convince them of the importance of his plan. which best lists the skills and knowledge he used to run his meeting? long-term planning skills, skills in math and finance, and a friendly attitude for giving presentations teaching skills, knowledge of educational laws, and a friendly attitude for giving presentations skills in math and finance, organizational skills for track information, and knowledge of information systems research skills for tracking information, long-term planning skills, and knowledge of human behavior