A scientist is studying a protist and records the following information about it: Cell has a nucleus
Has a flagella
Produces oxygen
Found in salt water
Which conclusion is best supported by the information?

The protist is an animal-like flagellate because it has a flagellum.
The protist is a plant-like dinoflagellate because it produces oxygen.
The protist is a plant-like dinoflagellate because it was found in salt water.
The protist is an animal-like flagellate because it has a nucleus.