What causes diffuse redness with pinpoint petechiae and white patches on the palate of a smoker?

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Total blockage of minor salivary gland openingsKeratin buildup combined with partial blockage of minor salivary glandsWidespread parakeratinization of the palatal mucosaExcessive formation of orthokeratin on the palateNone of the above

Explanation

The characteristic diffuse erythema and white patches on a smoker's palate result from keratinization along with partial obstruction of the minor salivary gland ducts, leading to the clinical appearance observed.