Which of the following features should one concentrate on when writing all the three-letter writing forms? A. Tone of language used B. Language used C. Grammar used D. Status of the receiver

C. Grammar used

When writing all three-letter writing forms, it is important to focus on using correct grammar to ensure clarity and professionalism in the communication. This includes proper sentence structure, punctuation, and spelling. While the tone of language and language used are also important, grammar is essential for effectively conveying the intended message. The status of the receiver may also be a consideration, but grammar should be a top priority in all forms of writing.

D. Status of the receiver