Read “Ah! Sunflower” by William Blake. What is the poem’s rhyme scheme?

Ah, sunflower, weary of time,
Who countest the steps of the sun;
Seeking after that sweet golden clime
Where the traveller’s journey is done;

Where the Youth pined away with desire,
And the pale virgin shrouded in snow,
Arise from their graves, and aspire
Where my Sunflower wishes to go!

A. aabb dede

B. acab babc

C. abab cdcd

D. abcd abcd