What is the best reason a business-like tone is important for a successful letter of complaint? that's what is expected in a business setting. legal, business language is required in a business transaction. your letter won't be read if it doesn't meet that requirement. it provides the clearest and most effective language to get positive results.

The correct answer is option D - A business-like tone is important for a successful letter of complaint because it provides the clearest and most effective language to get positive results.

When writing a letter of complaint it is important to use the proper tone to ensure it is effective. If the tone leaves the content unclear, confusing or even offensive, the reader won´t be able to properly react to the text.

In business writing we:

Use shorter sentences

Use active voice

Use simpler sentence structures among others.

Finally, in a business-like tone, the writer should show respect to the reader and to accomplish that he or she would stay neutral an avoid gendered pronouns.

you didn't list the options but im guessing it's resolving contradictions

fears about being blown up