Suppose that the gain, time constant and dead time of a process with the following transfer function: Gc(s) = 10 exp( 0.1s)/(0.5s + 1) are known with a possible error of 20% of their values. The largest permissible gain Kc of a proportional controller needs to be calculated below taking the values of process gain, time constant and dead time as________________?
A. 12, 0.6, 0.12

B. 12, 0.4, 0.08

C. 8, 0.6, 0.12

D. 8, 0.6, 0.08

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