The easiest way to figure out it is to simply say it naturally (assuming you're a native speaker). A is the only answer that doesn't include unnatural pauses.
Answer:
Myrtle seems to believe Tom genuinely loves her, and would marry her if only Daisy would divorce him. Nick knows that Tom would never marry Myrtle, and the lopsidedness of the relationship makes Myrtle a more sympathetic character than she would be otherwise.
Explanation:
The intensive pronoun are pronouns that add extra emphasis on the subject (or object) and which can be removed. In this sentence "himself" is the intensive pronoun.
Answer:
1. B. breaks apart from the inside
2. C. the explosion of a star
3. C. very large
4. B. how far light travels in one year
hope this helps! :-)
