What is the prepositional phrase in we ate lunch at the pizza place last saturday?

At
There is an entire song to remember the prepositions, if you can sing it to the Yankee-doodle song you should be able to remember them!
Above, Across, After, Against, Along, Among, Around, At
Before, Behind, Below, Beneath, Beside, Between, Beyond, By
During, For, From, In, Into
Of, On, Over, Through, To
(There's a few more lines but I learned this song in the fourth grade so this is where I go blank. But you can at least learn more than you know for now! Song association makes everything easier to memorize!)

Ibelieve the correct answer is c.