The answer is A: Business letter.
Explanation for each option:
A. Business letter: A business letter is a formal method of communication that typically includes structured components such as a heading (which may include the sender's address and date), an inside address (the recipient's address), a salutation, the body of the letter, a closing, and a signature block. These elements are designed to convey professionalism and clarity in business communications.
B. Interoffice memo: An interoffice memo, or memorandum, is a less formal method of communication used within an organization. It usually includes a heading with "To," "From," "Date," and "Subject" lines, but it does not typically have an inside address or a signature block like a business letter.
C. Blog post: A blog post is an informal and often personal piece of writing published on a website. It does not have structured components like a heading, inside address, or signature block. Instead, it may include a title, content, and sometimes an author byline.
D. Email: An email is a digital form of communication that can vary in formality. While it may include a subject line, greeting, and closing, it does not have a structured inside address or a formal signature block like a business letter. Emails often include a signature line, but it is typically less formal than that of a business letter.
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