Describe the transformation

How do you use the elimination method for this question? explain, because i really want to understand!

Which questions would most a reader identify the author's purpose for writing? check all that apply. what type of text is this? what type of reviews did the book receive? how many copies of the book have been sold? what is the central idea? how does this text make one feel?

Which best explains why this triangle is or is not a right triangle ?