Answer:
most likely baking soda it is the most common
Explanation:
The F note is the fourth line! So after you draw your bass clefs, make sure that you put the dots and then put another on the fourth line! An acronym to remember it is Good Boys Do Fine Always
I'm pretty sure it was the other way around.
The key signature allows the composer to use less accidentals which makes the music less cluttered. Just like the other person who answered this said when a score with multiple instruments is written it is almost always all in the same key to keep the music organized (their answer is better)
