(A) the safe (B) keeps her jewels (C) this is (D) where (E) she 

Correct option is A

Explanation:

"This is the safe where she keeps her jewels.." This sequence best matches logical English, describing what "this is," the location (where), and what the safe contains.

Information Booster:

Syntax drills like these train comprehension of location clauses and object-pronoun relatedness ("where the safe keeps...").

Additional Knowledge:

Other arrangements break logical subject-verb or clause relationships, resulting in fragments or run-ons.