The answer is "State-sponsored".
"State Sponsors of Terrorism"
is an assignment connected by the US Division of State to nations which the
Office affirms to have "more than once offered help for demonstrations of
global terrorism". Consideration on the rundown forces strict one-sided
sanctions. The nations as of now on the list are Iran, North Korea, Sudan, and
Syria.
Observational methods, case-study methods and survey methods.
Observational Method
With the observational method (sometimes referred to as field observation) animal and human behavior is closely observed. There are two main categories of the observational method — naturalistic observation and laboratory observation.
Case Study Method
Case study research involves an in-depth study of an individual or group of indviduals. Case studies often lead to testable hypotheses and allow us to study rare phenomena. Case studies should not be used to determine cause and effect, and they have limited use for making accurate predictions.
Survey Method
In survey method research, participants answer questions administered through interviews or questionnaires. After participants answer the questions, researchers describe the responses given. In order for the survey to be both reliable and valid it is important that the questions are constructed properly. Questions should be written so they are clear and easy to comprehend.