Rex is part of a group working on a group presentation. The group has decided that they would like to include a slideshow as a presentational aid to help focus the audience on the main points of the presentation. All of the members are contributing to different parts of the presentation and will need access to the slideshow at different times to add their individual content. What presentational software will allow the group to best collaborate on the project? A. Prezi B. Keynote C. PowerPoint D. Google Slides