Which of the forecast methods $(1,2,$ or $3)$ provides the highest degree of forecast accuracy over the three weeks as measured by the mean absolute deviation $($MAD$)?$ You may need to use the scroll bar at the bottom of the page to see the entire diagram.

$\backslash$table$[[$Week$,\backslash$table$[[$Actual$],[$Demand$]],\backslash$table$[[$Method $1],[$Forecasts$]],\backslash$table$[[$Method $2],[$Forecasts$]],\backslash$table$[[$Method $3],[$Forecasts$]]],[$Sept $27-$ Oct $3,27,21,22,23],[$Oct $4-$ Oct $10,25,30,29,22],[$Oct $11-$ Oct $17,31,25,32,27]]$

Select one:

a$.$ Methods $2$ and $3$ are equal

b$.$ Method $2$

c$.$ Method $1$

d$.$ Method $3$

e$.$ Methods $1$ and $2$ are equal