O'keeffe was taken by surprise when she saw her works exhibited because she did not consent for the exhibition of her work.
Step-by-step explanation:
O'keeffe became an established artist at the age of 17. She trained as an artist at the Art Institute of Chicago. She sent a few of her works to her friend who forwarded the same to renowned art dealer Stieglitz.
Stieglitz used her works in an exhibition. When O'keeffe saw that her work was on exhibition, she was taken by surprise because she never gave a consent to him to use her works. She confronted him for the same but allowed him to exhibit her work anyway. Later in 1917, Stieglitz suggested that a solo exhibition of her work should be arranged, to which she agreed.