Concept:
Major sociological thinkers are defined by the specific methodological and theoretical concepts they pioneered to analyze societal structures and human behavior.
Step 1:
Karl Marx employed the analytical framework of "Dialectical Materialism" (II) to interpret historical development, focusing on class conflict and material conditions.
Step 2:
Max Weber introduced the methodological tool of "Ideal types" (I), which are abstract, mental constructs used to capture the defining essential characteristics of specific social phenomena.
Step 3:
R.K. Merton developed a structural-functionalist theory of "Deviance" (IV), explaining how social structures can pressure individuals into non-conforming behavior.
Step 4:
Anthony Giddens, a prominent contemporary theorist, introduced the concept of "High Modernity" (III) to articulate the complex characteristics of the current late-modern social era.
Step 5:
Matching these theorists to their core concepts (A-II, B-I, C-IV, D-III) confirms that option (3) is the correct sequence.
$$\boxed{\text{(3) A-II, B-I, C-IV, D-III}}$$