Answer:
The correct answer is letter "B" and "C": Business letters; Interoffice memos.
Explanation:
Paper-based communications are means of transmitting information presented on paper. It is implemented in formal cases where there must be written support of a proposal or notification about the course of actions that will be taken in front of a claim case or problem, for instance. Business letters and interoffice memos fall under this category.
Electronic communication can be used at the corporate level as well but it has a certain degree of informality. Instant messages or e-mails are used to transmit different kinds of information within a firm.
