Select the most appropriate option that can substitute the highlighted segment in the given sentence. If there is no need to substitute it, select ‘No substitution’.
Not only the manager give me a refund, but he also offered me a 50% discount on my next meal.

Correct option is C

The correct substitution of the highlighted words is "Not only did the manager give me a refund."
· The original segment "Not only the manager give me a refund" is grammatically incorrect as it lacks the appropriate auxiliary verb and inversion for forming a correct conditional sentence. The corrected segment should include "did" to match the verb tense and to properly form the inversion needed for the 'not only... but also' structure. The correct phrase should use "give" as the base form of the verb following the auxiliary "did."
· Grammatical rule used: In sentences beginning with 'not only', an auxiliary verb is often used for inversion, and the main verb should remain in its base form.
· Example: Not only did the manager give me a refund, but he also offered a significant discount.