$\begin{array}{1 1}(A)\;A=\{-2,-1,0,1,2,3,4,5,6\}\\(B)\;A=\{0,1,2,3,4,5,6\}\\(C)\;A=\{3,4,5,6\}\\(D)\;A=\{5,6\}\end{array} $