A piece of evidence as seen in this passage is:
<h3>What is evidence?</h3>
Evidence is referred to something/statement which actually proves a point or fact. Evidence helps one to understand the subject matter as a result of what has proven it valid.
From the question, we can clearly see that an author was quoted in options A and D. These options actually present an evidence.
Learn more about evidence on brainly.com/question/8407102
The correct answer is A: Unimportant.
An example of an extra in a movie is when the main characters are walking down the street in Manhattan and there are a bunch of people walking in the background. The people that are walking in the background are the extras because they are unimportant for the scene. Extras are there so when you watch a show, movie, broadway, e.t.c, it won't look like the performance is empty. Just think of how the main characters would be walking down the street with an empty road around them. How much more boring than having extras in the background would that be?
I hope this helped! Stay cool! :-)