Which modal auxiliary verb correctly completes the sentence below? "To ensure compliance w… — JAMB UTME

Which modal auxiliary verb correctly completes the sentence below?

"To ensure compliance with safety regulations, all factory visitors _______ wear protective helmets at all times."

The modal auxiliary 'must' correctly completes the sentence by expressing obligation followed by a bare infinitive.

The modal auxiliary 'must' is used to express strong obligation or necessity and takes a bare infinitive verb ('wear') without 'to'.

Analyze the required meaning in the sentence context.

The sentence expresses an official rule and necessity regarding visitor safety.

Safety regulations mandate compulsory compliance.

Evaluate the grammatical structure following modal auxiliaries.

Standard modal verbs (must, should, can, may) are followed directly by the base form of the verb (bare infinitive) without 'to'.

Pure modal auxiliaries do not take to-infinitive complements.

Select the option that provides both the correct modal meaning and valid syntax.

'must' correctly fits the context and follows standard modal syntax.

It expresses obligation without inserting an ungrammatical 'to' particle.

Modal Auxiliaries and Bare Infinitives

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