Im my opinoin id say both a and d but id go wit d to be safe
Answer: Table of Contents
Explanation: A lot of books use table of contents to help its users navigate to which page and source they need to read and go over.
Sorry to say this but I think the question is asking you what event would make you feel as happy as billy, not anyone else.
Answer:
Antonym
Explanation:
Antonym's are words that mean the opposite of each other, like how good is the opposite of bad. So, when you look at these examples the opposite of reject is accept, and the opposite of something ending is something beginning. I hope this helps :)