The affix for without would be non-
Stars are glowing balls of gas that erupt at times.
Answer:
I was wrong, the answer is B for all future readers
The adjective clause in this sentence is 'who has read thousands of books'. It is an appositive, separated from the rest of the text by commas, and has an adjectival meaning - it modifies the noun, Anthony.
The answer is D, "for two weeks". It can be assumed that the word "weeks" applies to a period of time.
Answer A does not specify the number of weeks
Answer B is actually less concise
Answer C is more roundabout than the original statement.