Show that the differential form in the integral below is exact. Then evaluate the integral. (4,1,1) T (0,0,0) 12x dx + 20y dy + 12z dz Select the correct choice below and fill in any answer boxes within your choice. OA. (4.1.1) 12x dx + 20y dy + 12z dz = (0,0,0) (Simplify your answer. Type an exact answer.) B. The differential form is not exact.

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