The correct answer is C. Statsmodels.
Statsmodels is a Python module that provides a variety of statistical and econometric modeling tools. It is a popular choice for data analysis and statistical modeling, and it is used by a wide range of users, from students and researchers to data scientists and engineers.
Bokeh is a Python library for interactive visualization. It is used to create interactive plots, dashboards, and maps. Seaborn is a Python data visualization library based on Matplotlib. It provides a high-level interface for drawing attractive statistical graphics.
Neither Bokeh nor Seaborn are primarily used for statistics and econometrics.