When addressing an unknown audience in a cover letter, what type of tone should a writer have? a. personal b. polite c. grammatical d. relaxed

B. Polite because if it is to unknown audience you dont want to become personal

 
B. Polite 

Explanation: 
You should always have a formal, polite tone as a default when you don't know who you are talking to, or if you are talking to important people. The only time you would be informal or personal is when you are talking to friends or people you are comfortable with. Grammatical is another tone you would use, but that falls under the polite tone. 

Transition words are words like first, furthermore, besides, for instance, secondly, as a result using words like those should you write paragraphs showing time. you can start with first and then end with lastly or as a result