Which of the Following Best Describes an Instance of Methodological

Which of the following best describes an instance of methodological advancement informing psychological theory?

A) The invention of the Internet has allowed surveys to be accessed by participants from all over the world.
B) The development of faster computing ability has enabled complex statistical models to be run on large datasets.
C) The foundation of the Institutional Review Board has allowed researchers to recruit a much more diverse population of participants.
D) The discovery of DNA sequencing has enabled researches to make claims about the role of nature in behavior.