Answer:
B
Explanation:
A commercial source might have a reason to lie, or bend the truth, for financial gain. With an anonymous author, you can't identify them, so you don't know if they would tell the truth or be right or not. An established record of research proves that the author knows how to find and state facts, and cares that their writings are accurate.
My opinion would be traffic?
Answer:
Black, white, turquoise,and sea green
Brass - trumpet/trombone/tuba
strings - viola/violin
percussion - drums/symbols
woodwind - flute/ basson/recorder
hope this helps!!!
