Step 1: Set up the match. The components of attitude $(a, b, c, d)$ must be paired with their meanings $(I, II, III, IV)$. Step 2: Map the Cognitive component. It deals with thoughts and beliefs, giving $a \to I$. Step 3: Map the Affective component. It deals with emotions and feelings, giving $b \to II$. Step 4: Map the Behavioural component. It deals with actions and tendencies, giving $c \to III$. Step 5: Map the Social influence factor. It reflects external impact on attitude formation, giving $d \to IV$. Step 6: Combine the pairs. \[ a\text{-}I,\ b\text{-}II,\ c\text{-}III,\ d\text{-}IV \] Step 7: Select the option. This direct order is option A. \[ \boxed{\text{A. a-I, b-II, c-III, d-IV}} \]
