Which Option Reflects a Quantitative Research Design

Which option reflects a quantitative research design?

A) The researcher has created a design that includes control of extraneous variables.
B) The researcher plans to investigate and explain the research question through narrative data.
C) To collect data,the researcher will conduct a series of unstructured interviews with the study participants.
D) The research is designed to explore the way the study participants feel about their experiences with the research topic.