Multi-choice problem: Continue writing the next sentence in this paragraph:

A person trowels wet concrete on the ground. Another person uses a piece of wood to level the concrete. a water mixture

Choices:
1). is added to a bowl.
2). is added to bowl.
3). is poured on the concrete, it is scored and tiles are pounded on top.
4). is used to mix beach water and sand mix.
3).