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Travis works for a business that manufactures industrial metal clocks. All of the following are processes the clock maker must pass the inputs through before they are turned into the final outputs, clocks for his customers, except


A) cutting metal sheets into circles for the clock center, numbers, and clock hands.
B) welding the metal pieces together to form the clock's basic design.
C) selling the finished clocks to customers.
D) heating and shaping repurposed metal into the clock frame.
E) applying metal sealant to keep the metal from rusting or oxidizing.