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【Paragraph 1】 Although we now tend to refer to the various crafts according to the materials used to construct　them—clay, glass, wood, fiber, and metal—it was once common to think of crafts in terms of function, which led to their　being known as the "applied arts." Approaching crafts from the point of view of function, we can divide them into simple　categories: containers, shelters and supports. There is no way around the fact that containers, shelters, and supports　must be functional. The applied arts are thus bound by the laws of physics, which pertain to both the materials used in　their making and the substances and things to be contained, supported, and sheltered. These laws are universal in their　application, regardless of cultural beliefs, geography, or climate. If a pot has no bottom or has large openings in its sides,　it could hardly be considered a container in any traditional sense. Since the laws of physics, not some arbitrary decision,　have determined the general form of applied-art objects, they follow basic patterns, so much so that functional forms can　vary only within certain limits. Buildings without roofs, for example, are unusual because they depart from the norm.

　　However, not all functional objects are exactly alike; that is why we recognize a Shang Dynasty vase as being different　from an Inca vase. What varies is not the basic form but the incidental details that do not obstruct the object's primary　function.

　　Which of the following best expresses the essential information in the highlighted sentence? Incorrect answer choices change the meaning in important ways or leave out essential information. ( Applied Arts and Fine Arts)

　　○Functional applied-art objects cannot vary much from the basic patterns determined by the laws of physics.

　　○The function of applied-art objects is determined by basic patterns in the laws of physics.

　　○Since functional applied-art objects vary only within certain limits, arbitrary decisions cannot have determined　their general form.

　　○The general form of applied-art objects is limited by some arbitrary decision that is not determined by the laws of　physics.