Nikolay Rostov refused to apologize after an incident in which he (blank)---.
a. Publicly confronted the lieutenant who had stolen Denisov's money purse
b. Struck the army doctor who had failed to save Denisov's life
c. Danced with a captain's wife at the party to celebrate Denisov's promotion
d. Insulted the eighty-year-old tailor who had made Denisov's dress uniform