Answer:
D) Slides
Step-by-step explanation:
A slide is exactly one page of presentation commonly used in PowerPoint. It is usually shown via a series of image slides on a projected screen.
This is the best tool Yara needs to provide step-by-step instructions to her staff on how to use a new system for conducting performance reviews.
Slides would be very helpful as they would show the steps one at a time to the members of Yara's staff so they can learn better and faster.