Syntax governs the arrangement of words and phrases to create well-formed sentences, including rules for word order and the use of auxiliary verbs in different sentence types. Analyze the following statements regarding English syntax:

I.Adjectives generally precede the nouns they modify, except in specific cases such as when the adjective functions as a subject complement.
II.Inversion of the subject and auxiliary verb is mandatory in sentences beginning with negative adverbs like "seldom" or "never".
III.Intransitive verbs require a direct object to complete their meaning within a sentence structure.

Choose the correct alternative: