Every major and minor scale, the notes of the scale are numbered using:

a) american numerals

b) roman numerals

c) german numerals

d) italian numerals

The correct answer would be B. Roman Numerals.

The comma should appear after the quote.

Yes because in graphic design you add elements of art into one piece and/or program. although, you place together graphic designs on a computer,  you still have to know about the principles of design which is included in art.