When researchers observe and describe a current condition and look to the past to try to identify the possible causes of the condition, it is called a

Causal-comparative studies

Explanation:

Casual-comparative study is the research that is carried out by distinguishing and contrasting between two of more communities of people based on evaluating the impact caused by independent component on the dependent component.

Research included comparison along with co-relating the variables. It helps in understanding and studying about cause-and-effect that takes place in different experimental situations.

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.

it should be c, women were allowed to vote in all states because federal law supersedes state law.

"states can make their own laws, as long as they don't contradict what the federal law states. the states do not have the authority to pass a law that negates a federal law." -google