The urban subject matter and tighter brushwork of Georgia O'Keeffe's The Radiator Building—Night, Night York is a direct result of the artist's relationship with .

the answer is Alfred Stieglitz

Explanation: The urban subject matter and tighter brushwork of Georgia O'Keeffe's The Radiator Building—Night, Night York is a direct result of the artist's relationship with Alfred Stieglitz. Alfred Stieglitz provided her with opportunities by introducing Georgia O'Keeffe to European modernist tendencies in 1908 and this lead to the regular display of her artwork at his gallery and exposure to other working artists. Georgia paintings impressed Alfred, the black, grey and blue colors dominate the canvas in O'Keeffe's City Night.

i looked up you question and i found this on quizlet i hope this is one of your answer choices.

modern american cars are not available due to trade restrictions