10 POINTS....................................
Tickets to a science museum can be bought online. There is a $1 service fee per person for members and $3 service fee per person for non-members to buy tickets online. Which expression can be used to find the total service fee to buy tickets online by a group of 5 members and n non-members? A 9n B 15n C 5 + 3n D 5 + 15n