Select the option that completes the sentence CORRECTLY. The plan ________ is…

Concept

An emphatic (intensive) pronoun — myself, yourself, himself, herself, itself, oneself — re-states a noun or pronoun that has already been named and stresses it. It must agree with that antecedent in person, number and gender.

Applying it here

The word being emphasised is “the plan” — third person, singular and neuter (a thing, not a person). The emphatic pronoun that matches a singular, neuter thing is “itself”, giving “The plan itself is quite sound…”, i.e. the plan as such is good even though its implementation is not.

Why the other forms do not fit

• “Myself” is first person; it can emphasise only “I/me”, not the thing named in the sentence.

• “Himself” is third-person masculine; it is used for a male person, not for a thing.

• “Oneself” is an indefinite, generic form used in impersonal statements (e.g. “one must pace oneself”); it cannot point back to one specific, named noun.

Cross-check

Swap in other singular neuter nouns — “the report itself”, “the car itself”, “the team itself” — and “itself” still fits. This confirms that a singular, neuter antecedent takes “itself”.