How do you determine whether r(t) = f(t)i + g(t)j + h(t)k is continuous at t= a? Choose the correct answer below. O A. Find lim r(t), if lim r(t) does not exist, r(t) is continuous. B. Find lim r(t), if lim r(t) = r(a), r(t) is continuous. t-a ta OC. Find lim r(t), if lim r(t) does not exist, r(t) is continuous. t-a t+a O D. Find lim r(t), if lim r(t) = r(a), r(t) is continuous. t00

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