Robert is managing a construction project. The project's client is responsible for the design, while Robert’s organization is responsible for the construction. There has been a 45-day delay on a couple of major structure designs. This delay can only be recovered through crashing and will cost $2 million in addition to the approved budget.

Robert prepares a detailed report and emails it to the client. In this scenario, Robert’s email to the client is an example of:

Informal unofficial communication Formal unofficial communication Informal official communication Formal official communication