From all the available options, the option you would need to use to check the amount of time you need to present a slide in a presentation would be (A) rehearse timings.
The rehearse timing option that you can use in Microsoft PowerPoint, allows you to test how long do you need to present one slide. You can choose then to let the slide automatically play while you present it since Microsoft PowerPoint would then set it up based on the amount of time you spend for each slide.