In this excerpt from william dean howells's "editha," which sentences contain sarcasm?

a. no, you didn't expect him to get killed," mrs. gearson repeated, in a voice which was startlingly like george's again. "you just expected him to kill some one else

b. you thought it would be all right for my george, your george, to kill the sons of those miserable mothers and the

c. i my god he didn't live to do it