Read the poem below and answer the question.

the journey by mary oliver one day you finally knew what you had to do, and began, though the voices around you kept shouting their bad advice -- though the whole house began to tremble and you felt the old tug at your ankles. "mend my life! " each voice cried. but you didn't stop. you knew what you had to do, though the wind pried with its stiff fingers at the very foundations, though their melancholy was terrible. it was already late enough, and a wild night, and the road full of fallen branches and stones. but little by little, as you left their voices behind, the stars began to burn through the sheets of clouds, and there was a new voice which you slowly recognized as your own, that kept you company as you strode deeper and deeper into the world, determined to do the only thing you could do -- determined to save the only life you could save.

the effect of the sound device assonance is that it creates

a)a sense of dissonance
b)an unnatural pattern in the poem
c)an emphasis on the importance of those three words
d)a comic sing-song effect