Read this excerpt from “death, be not proud” by john donne. what rhyme scheme does the poem use?

death, be not proud, though some have called thee
mighty and dreadful, for thou art not so;
for those whom thou think'st thou dost overthrow
die not, poor death, nor yet canst thou kill me.

from rest and sleep, which but thy pictures be,
much pleasure; then from thee much more must flow,
and soonest our best men with thee do go,
rest of their bones, and soul's delivery.

a.
aaba
b.
aabb
c.
abab
d.
abba