Which of the following lines is an example of the poet's use of apostrophe?
a. if i were a dead leaf thou mightest bear; if i were a swift cloud to fly with thee;
b. the wing d seeds, where they lie cold and low, each like a corpse within its grave
c. o wild west wind, thou breath of autumn's being
d. drive my dead thoughts over the universelike withered leaves to quicken a new birth