100
1. During lunch, at the campus cafeteria, Mildred noticed the dirty tables, the overworked cashiers, and the exorbitant price for a watery soda.
A. Should you remove the comma after lunch?
B. Or should you remove the comma after cashiers?
What is A?
—because when a series of prepositional phrases introduces a main clause, use a comma at the end of the series.