Final answer:
In this research study, 'better' can be defined by the number of senators each state has, and researchers can use statistical data on population size and senatorial representation to form a hypothesis.
Step-by-step explanation:
In this research study on senatorial representation, the definition of 'better' can vary depending on the aspect being evaluated. Option A suggests defining 'better' by the number of senators each state has, and looking for statistical data on population size and senatorial representation. This approach analyzes the disparity in representation based on population sizes.
Using statistical data, researchers can compare the number of senators from less populous states to those from the most populous states to determine if there is unequal representation. By examining the population size and senatorial representation, researchers can form a hypothesis based on the evidence they find.