Is light fastest ? if not then how?

yea it is the fastest in my view

In one second, light travels approximately 186,270 miles (more than seven times the circle of the Earth). Light is recognized as the fastest object in the world, and its velocity in empty space is regarded as a basic constant of nature in contemporary physics.

i guess that visual aids present persuasive examples to what you are presenting, some factors would be theme (does it fit with the color, information, what you are presenting), size (can you see it, is it a big enough span of data/information), and overall look of the visual aid.

hope this : )

yup its correct its: c) b b