Rebbeca has finished with the research and outline portion of her slide presentation. Now, the next logical step is to begin working on what part of her slide?

The next step is creating the layout and template style

Explanation:

As we know that the power point presentation is used for preparing the slides  i.e. easy for the company to describe them by adding the images, videos with sounds.

As in the situation it is given that the Rebbeca completed with the portion of the research and outline now the next and logical step would be that she could create the layout and the style of the template so that it looks attractive to the audience

Therefore the above represents the answer  

it can either be 2. or 4. : ) tell me if i'm wrong or right