Which of the following is recommended as the best style for a business letter?

Direct, conversational phrasing is appropriate for most situations.

Official, bureaucratic language such as "Pursuant to our agreement" is recommended in order to create a businesslike tone.

The style of a business letter can typically be less formal than the style of an in$-$house memo.

Use of abbreviations and phonetic spelling, similar to those used in texts, is now considered appropriate for most business letters. $.$