Answer:
He's lived in Hanoi since 1990
Explanation:
Main entries come first. A main entry consists of the meaning shared by the members of the synonym group, a verbal illustration, and lists of synonyms as well as any related words, phrases, near antonyms, and antonyms.
I'd say the correct answer is B, because 'in the desert is part of the subject/noun 'canyon', and modifies it, that is, refers to it, describes it in more detail.
Technically, all of these answers are ways to revise your work. I would go with B, Run a spell check and correct errors because it looks like the most accurate way to edit documents.
