Suppose someone forecasted demand using Holt's method. The model was tested with various combinations of alpha $($smoothing constant for series$)$ and beta $($smoothing constant for trend$).$ Given the following results for the MAD $($mean average deviation$),$ MSE $($mean squared deviation$),$ and BIAS, which model should be selected for forecasting future demand?

alpha beta MAD MSE BIAS

$0\mathrm{.}10\mathrm{.}110\mathrm{.}23146\mathrm{.}94-10\mathrm{.}23$

$0\mathrm{.}20\mathrm{.}16\mathrm{.}4860\mathrm{.}55-6\mathrm{.}29$

$0\mathrm{.}30\mathrm{.}24\mathrm{.}1126\mathrm{.}3-3\mathrm{.}03$

$0\mathrm{.}30\mathrm{.}63\mathrm{.}6822\mathrm{.}06-1\mathrm{.}38$

a$.$

alpha $=0\mathrm{.}3,$ beta $=0\mathrm{.}6$

b$.$

alpha $=0\mathrm{.}3,$ beta $=0\mathrm{.}2$

c$.$

alpha $=0\mathrm{.}2,$ beta $=0\mathrm{.}1$

d$.$

alpha $=0\mathrm{.}1,$ beta $=0\mathrm{.}1$