Answer: The correct answer is : C. Gregor has lost the ability to speak.
Explanation: For Gregor all his situation changes when he wakes up one morning observes that it has become a very large insect, his human part from that moment enters into a conflict with the animal (insect) and his life becomes unbearable. The insect was distressed because he could miss the train and be late to the office and despite everything he was very responsible.