Correct option is B
A → D: “She often spend …” needs third-person-singular agreement: “spends.” Replacing the highlighted part with “spends” fixes the verb; D (“rarely spends”) supplies a correct verb form. Note: the adverb changes the meaning (often → rarely), but in such replacement items grammar takes priority over adverbial choice.
· B → F: Place “not only” before the auxiliary with inversion: “Not only did she submit the claim, she also attached receipts.” Hence B–F.
· C: “Had the token been issued earlier, the queue would have moved faster.” is already correct (inverted third conditional). Replacing with E (“The token had been…”) would break the conditional/inversion.
Why others are wrong
· (a) Misses the required inversion in B.
· (c) A–E is ungrammatical in context; B–D mismatches meaning and leaves inversion unresolved.
· (d) B–D maps the wrong fix to B; it still lacks inversion.
· (e) Ignores the necessary correction in B and the verb agreement in A.