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 movie chariots of fire is about two british sprinters competing in the 1924 olympics.
b) the movie, chariots of fire, is about two british sprinters competing in the 1924 olympics.

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