Final answer:
The best word to complete the sentence is 'petulant,' which describes someone who is easily irritated in a childish way, fitting the context of the sentence about a man's reaction to being woken up at an untimely hour. Option A is correct.
Step-by-step explanation:
The question requires selecting the adjective that best completes the sentence describing how a grown man would behave when being woken up at three in the morning. Given the options, the most suitable choice is A. Petulant, which means easily irritated or annoyed, especially in a childish way.
The other options do not match the context of the sentence. B. Evince means to show or express clearly; C. Invincible means incapable of being defeated or overcome; D. Protracted means extended in time or prolonged; and E. Retract means to draw back or withdraw.
Therefore, the complete sentence is: 'I hardly expected a grown man to become so petulant when I awakened him at three in the morning.'
The word that best fills in the blank in the given sentence is A. Petulant. Petulant means showing sudden irritation or impatience. In the context of the sentence, it implies that the grown man became irritable or impatient when awakened at three in the morning.