Your company intends to open a new office on the other side of the country. The goal is to expand the company's operations and move into some new and more exclusive markets. This is a major step for the company, and you want your shareholders to be impressed. Which type of correspondence should you use to communicate with your shareholders?

a. memo
b. email
c. microblog post
d. letter

Letter is a formal written mode of communication that involves someone called the sender to convey message in a text-based form and deliver it to another person called the recipient.

When communicating with the shareholders, letters serve as a formal means of communication which can be used to relay the message about the new office to the shareholders because it can cater for specificity of a recipient, in which the shareholders need to be addressed.

Memo is used to convey message within the organisation. So it cannot be used to convey message about the new office to shareholders who are not within the organisation.

Microblog post and email are not specific enough to the message about the new office to the shareholders.