Please answer the following question: Information: - Kalmar and Ruby refers to the famous songwriting team of the first half of the 20th century of Bert Kalmar and Harry Ruby. - Guy Reginald Bolton (23 November 1884 4 September 1979) was an Anglo-American playwright and writer of musical comedies. Born in England and educated in France and the U.S., he trained as an architect but turned to writing. Bolton preferred working in collaboration with others, principally the English writers P. G. Wodehouse and Fred Thompson, with whom he wrote 21 and 14 shows respectively, and the American playwright George Middleton, with whom he wrote ten shows. Among his other collaborators in Britain were George Grossmith Jr., Ian Hay and Weston and Lee. In the U.S., he worked with George and Ira Gershwin, Kalmar and Ruby and Oscar Hammerstein II. - Ira Gershwin (December 6, 1896 August 17, 1983) was an American lyricist who collaborated with his younger brother, composer George Gershwin, to create some of the most memorable songs of the 20th century. - Nice Work If You Can Get It is a musical with a score by George and Ira Gershwin , a book written by Joe DiPietro , and based on material by Guy Bolton and P. G. Wodehouse . Nice Work premiered on Broadway in April 2012 . - Oscar Greeley Clendenning Hammerstein II (July 12, 1895 August 23, 1960) was an American librettist, theatrical producer, and (usually uncredited) theatre director of musicals for almost forty years. Hammerstein won eight Tony Awards and two Academy Awards for Best Original Song. Many of his songs are standard repertoire for singers and jazz musicians. He co-wrote 850 songs. Hammerstein was the lyricist and playwright in his partnerships; his collaborators wrote the music. Hammerstein collaborated with numerous composers, such as Jerome Kern, with whom he wrote "Show Boat", Vincent Youmans, Rudolf Friml, Richard A. Whiting and Sigmund Romberg; but he is best known for his collaborations with Richard Rodgers, which include "Oklahoma!", "Carousel", "South Pacific", "The King and I", and "The Sound of Music". After reading the paragraphs above, we are interested in knowing the entity with which 'nice work if you can get it ' exhibits the relationship of 'composer'. Find the answer from the choices below. Choices: - bert kalmar - george gershwin - ira gershwin - jerome kern - oscar hammerstein ii - rudolf friml - sigmund romberg - vincent youmans
A:
george gershwin