Which sentence is written active voice—not passive voice?

Question

Pizza was suggested instead of cheeseburgers.

Mickey ate a cheeseburger at lunch instead of pizza.

At lunch, the cheeseburger was eaten by Micky.

The cheeseburgers were purchased by Micky.

Answer 1

The sentence written in active voice is:

Mickey ate a cheeseburger at lunch instead of pizza.