C). A video that answers the question, 'Is Mars really red?'
Explanation:
As per the question, the media source that would best support the highlighted sentence would be 'a video that answers the question and clarify that 'is mars really red?' as it would graphically clarify the audience's doubt that how mars despite being a little butterscotch in color, recognized as 'red planet'. This video would help <u>substantiate the claim more conveniently and establish its credibility among the audience more effectively</u>. Therefore, <u>option C</u> is the correct answer.
The answer is a video that answers the question, "Is mars Really Red?" because the passage talks about the color of Mars and how it's known as a red planet even though it's more of a butterscotch color.
