Answer:
1 & 3 only
1. Limit the amount of text to not more than 6 lines per slide
3. Stick to a limited number of colors and use them consistently
Explanation:
The general PowerPoint slide rule is 6 x 6 presentation rule which translates to
6 words per line and 6 lines per slide
It helps keeping your slide from being so dense and packed with information that people don't want to look at it.
It's always important to keep consistent colors in PowerPoint slides. This enables you to maintain cool rhythm throughout the slides.
Inconsistent colours easily distracts your audience/readers.
It's not advisable to use capital letters all through in PowerPoint slides.