Answer:
Business letters can be confidential.
Explanation: A Business letter is a formal letter used in Organisations to effectively communicate and transact business.
Examples include letters like EXPRESSION OF INTEREST LETTERS, APPOINTMENT LETTERS,LETTER OF REQUEST ETC. A business letter can be used to convey certain confidential or private information from one client to another. There are certain components of a business letter which includes the salutation,Date, Address of both the sender and the reciever,the body of the letter, conclusion etc.