Need
for questions 36–39, each sentence contains an appositive phrase. determine whether the appositive phrase is essential or non-essential. mark the sentence that punctuates the appositive phrase correctly.

36.
a) a delay a serious one occurred because of foot-deep snow.
b) a delay, a serious one, occurred because of foot-deep snow.

37.
a) first lady michelle obama graduated from princeton university and harvard law school.
b) first lady, michelle obama, graduated from princeton university and harvard law school.

38.
a) the novel do androids dream of electric sheep is about a futuristic society in which robots have feelings.
b) the novel do androids dream of electric sheep is about a futuristic society, in which robots have feelings.

39.
a) new cyclists, especially those who are older, should not strain themselves.
b) new cyclists especially those who are overweight, should not strain themselves.