in which of these sentences is the list correctly punctuated?\no if you go to the mall, arrive early wear…

in which of these sentences is the list correctly punctuated?\no if you go to the mall, arrive early wear comfortable shoes and have a plan.\no before you start baking, you will need sugar, eggs, flour, and vanilla extract.\no when you pack, be sure to include, sunscreen, towels, and healthy snacks.\no once at the library, turn off your phone, lower your voice and browse quietly.
Answer
Brief Explanations:
In a list within a sentence, a comma should be used after each item except the last one. In the second option "Before you start baking, you will need sugar, eggs, flour, and vanilla extract.", the list of baking - ingredients is punctuated correctly. The first and fourth options lack commas to separate items in the list. The third option has an unnecessary comma after "include".
Answer:
Before you start baking, you will need sugar, eggs, flour, and vanilla extract.