$\begin{array}{1 1} (a)1-D, 2-A, 3-C, 4-B \\ (b) 1-A, 2-C, 3-B, 4-D \\ (c)1-C, 2-B, 3-D, 4-A \\ (d)1-B, 2-D, 3-A, 4-C \end{array} $