Which sentence does not contain any punctuation errors?
 A.
 My two best friends Alexandra and Bethany, went with me on a shopping trip.
 B.
 My two best friends, Alexandra and Bethany went with me on a shopping trip.
 C.
 My two best friends, Alexandra, and Bethany, went with me on a shopping trip.
 D.
 My two best friends, Alexandra and Bethany, went with me on a shopping trip.