One of the biggest disadvantages of case studies is a lack of

One of the biggest disadvantages of case studies is a lack of "generalizability".

A case study is a top to bottom investigation of a specific circumstance instead of a broad factual review. It is a technique used to limit an extremely wide field of examination into one effortlessly research able point while generalization, which is a demonstration of thinking that includes drawing expansive inferences from specific observations, is generally recognized as a quality standard in quantitative research, yet is more disputable in qualitative research.

the answer is

a) revise existing treaties

b) do away with political alliances

c) prevent the spread of communism

d) bring an end to european colonization

the main goal of the southeast asia treaty organization was to prevent the spread of communism in southeast asia.

are there any options?