Opportunistic reaction to events compose much of political life

Which of the following would NOT be found in low-constraint research?

A) Sophisticated measurement instruments B) Observation of more than one participant C) Random assignment of participants to conditions D) Any sort of statistical analysis

In Brazil, each state and the federal district elects a. three senators. b. two senators

c. one senator. d. a number of senators in proportion to the size of their state's population, with no state having less than 1 or more than 5 senators. e. zero senators, as all senators are chosen by the state legislatures.