In spite of his friends' frequent invitations to join them in their summer activities, Mark devoted himself to musical scores and practiced his violin faithfully therefore, it came as no surprise that his audition for the city's youth orchestra, one of the best in the nation, was successful. June needs to correct the punctuation in her sentence.
Which change should she make?
O 1. Insert a semicolon after the word "activities." 0 2. Insert a semicolon after the word "faithfully." O 3. Delete the comma after the word "therefore."
04. Delete the comma after the word "orchestra."​