Question

One of the ways key signatures affect music notation is:

They make writing more difficult because they use more room on the page.
They make it harder because it is impossible to memorize all the key
signatures.
They make it harder because they make the notes higher.
They make it easier because there is no need to constantly mark accidentals
in front of repeatedly used sharp or flat notes.
They make it easier because they simplify rhythms.
​

Answer 1

I think the fourth option

Answer 2

Answer: Fourth option

(Sorry if it's incorrect, I tried my best)