Memos and letters are often distributed electronically through which of the following means?

A) through online discussion forums
B) through microblog posts
C) as attachments to email messages
D) through file-sharing services

Distributed Electronically

means content or data that is shared or disseminated through digital means, such as the internet or electronic devices.

Memos and Letters

Written forms of communication typically used in a business or professional setting; memos are used for internal communication, while letters are often used for external or formal correspondence.