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Why does a conservative vector field produce zero circulation around a closed curve? Choose the correct answer below. O A. A conservative vector field F on a domain D has a potential function ( such that F = Vo. Since V x Vo = n, it follows that V x F = n, and so the circulation integral OF . dr = | | (V x F) - n dS is zero on all closed curves in D. S O B. A conservative vector field F on a domain D has a potential function q such that F = Vo. Since V x Vo =0, it follows that V x F = 0, and so the circulation integral OF . dr = (V x F) . n dS is zero on all closed curves in D. S O C. A conservative vector field F on a domain D has a potential function q such that F = V x Vo. Since V x Vo = 0, it follows that F = 0, and so the circulation integral OF . dr = | |(V x F) . n dS is zero on all closed curves in D. S