[Solved] Dr.Smith noticed that during the summer,an ice-cream stand extended their hours.He also noticed that temperatures were higher and that people consumed more ice cream.The variable of hours the ice-cream stand was open is an example of A) the experimental method. B) the third-variable problem. C) cause and effect. D) the placebo effect. American Art Scene: The development and study of visual arts in the United States, encompassing a wide range of movements, artists, and institutions that contribute to the American cultural landscape. American Modernist Art: Artwork produced in the United States during the late 19th and early 20th centuries, characterized by a break with traditional styles and experimentation with new forms of expression. The Armory Show: A landmark exhibition held in 1913 in New York City, showcasing works of modern art and serving as a pivotal moment in the introduction of European avant-garde art to the American public. Nude Descending: Refers to "Nude Descending a Staircase, No. 2," a famous painting by Marcel Duchamp that combines elements of Cubism and Futurism, depicting motion in abstract form.