The absolute difference between average annual sales (in units) of which pair of WACs type is the highest
Explanation:
Units sold in Apr-14, May-14 and Sep-14 = 3830
Units sold in Jun-14, Jul-14 and Dec-14 = 3864
Units sold in Aug-14, Feb-15 and Mar-15 = 3986
Units sold in Oct-14, Nov-14 and Jan-15 = 3928
Thus, the absolute difference between average annual sales (in units) of 1 ton and ½ ton is maximum.
Hence, option (a).
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