I think that the anwser is C hope this helps
si porque me froh del brase ridz
Answer:
The bottom note space is F, the second space indicates A, the third note sounds C and the fourth, E.
Explanation:
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)