Best Answer Explained in Below-:

The correct answer to the question—'Internal memos and reports can be exchanged electronically by'—is A) E-mail. E-mail is a digital communication tool that allows users to send and receive messages over the internet, making it a highly effective way to exchange internal documents such as memos and reports.

Unlike traditional methods like a typewriter (D), which is a mechanical device requiring physical materials, or a telephone (B), which primarily enables real-time voice communication, e-mail facilitates asynchronous communication. This means that recipients can access the information at their convenience, which is crucial in a business environment where quick decision-making is essential.

Furthermore, e-mail serves as a central repository for business correspondence, allowing for easy storage, searchability, and archival purposes. It supports the attachment of documents, allowing users to send detailed reports without the need for physical copies. Fax (C) is also a method of transmitting documents, but it relies on phone lines and hardware, making it less efficient compared to the widespread and instantaneous nature of e-mail. Overall, e-mail's combination of convenience, speed, and efficiency makes it the preferred choice for exchanging internal memos and reports electronically.