Dayjvm
contestada

When is it not appropriate to use a comma?
A.Before you use a coordinating conjunction
B.When you want to separate items in a list
C.When you want to introduce a list
D.When you want to set off introductory material

Respuesta :

C.When you want to introduce a list
You don't go, "I need to get, milk, butter, and sugar."
You go," I need to get milk, butter, and sugar. 
I believe the answer is c