Marcel Duchamp's Fountain is an example of what art form? 

Although Gluck is perhaps best remembered for his mid-eighteenth-century operatic reforms, other composers who also tried to reform opera at the same time were?

a) Johann Adolph Hasse and Baldassare Galuppi b) Niccolò Piccinni and François-Joseph Gossec c) Domenico Cimarosa and Antonio Salieri d) Niccolò Jommelli and Tomasso Traetta

Which of the following is not a method directors use to achieve focus?

A) Matching focus B) Levels C) Contrast D) Triangulation