match the method to the appropriate description. A. Informants' ratings B. Sociometric method C. Observation D. Self-designating method select 1. Asking members of a social system who they go to for advice and information about an idea. select 2. Asking subjectively selected key informants who are especially knowledgeable about a social system to identify the opinion leaders. select 3. Asking respondents to indicate the degree to which others in the social system regard them as an opinion leader. select 4. The researcher identifies and records the communication behavior in a system