What is the extent to which an experiment has effectively controlled for confounding variables?
a. external validity
b. case study
c. internal validity
d. confounding variable

C) Internal Validity

Explanation:

Internal validity in terms of confounding variable is defined as the control mechanism which monitors an experiment so that confounding does not occur.As confounding mechanism can result in more than one cause to occur at the same ti me of research or experiment.Thus , confounding is controlled to decrease it and increasing the internal validity

Other option are incorrect because external validity permits occurrence of external variable in research and experiment.Case study is the content research in form of case.Confounding variable produce numerous cause at a particular time. Thus, the correct option is option(C).

the federal government of the united states was established by the constitution. us is a presidential republic. the president is head of state, head of government and of a two party legislative and electoral system. the supreme court balances the powers of the federal and the state government. yhe executive branch is headed by the oresident. there are two chambers of congress, the senate and the house of representatives. judicial power is exercised by the judicial branch (or judiciary), comprised of the supreme court and lower federal courts. the judiciary's function is to interpret the   constitution as well as the federal laws and regulations.

answer; quantitative versus qualitative research;