Which of the following sentences is grammatically correct?

Question

Quizplus · Accepted Answer

The inexperienced cashier did manage to scan my items with efficiency.
The auxiliary verbs do, does, and did can be followed by the bare infinitive in affirmative sentences to express emphasis, which is not needed in the context of this sentence. On the other hand, the words "with efficiency" can be substituted by the adverb "efficiently", thus respecting the linguistics economy principle, the objective of which is to save more time and energy by conveying more information with less effort.
The inexperienced cashier efficient did manage to scan my items.
The word "efficient" is misplaced. If we want it to describe the word "cashier" it should be placed before the noun, and if we want it to describe the word "scan", it should be transformed into an adverb ("efficiently") and placed after the verb and the direct object. On the other hand, the auxiliary verbs do, does, and did can be followed by the bare infinitive in affirmative sentences to express emphasis, which is not needed in the context of this sentence.
The inexperienced cashier managed to scan my items efficient.
The word "efficient" is an adjective and in this sentence, it's modifying the verb "scanned", which is incorrect. Adjectives can't modify verbs, adverbs do. In this case, "efficient" should be substituted by "efficiently."

Which of the Following Sentences Is Grammatically Correct