What is the right answer for this? I thought an email from CEO is formal, but the answer suggested it is INFORMAL. Is that a PMI thinking? One of your projects was delivered late, and in turn, it resulted in a loss of $1 million. CEO made some reforms to make sure the work is delivered on time. The CEO office sent it a memo to make sure people are adhering to it. What type of communication did the CEO send? A. Formal B. Informal C. Unofficial D. External