$(0\mathrm{.}5$ points$)$ Reproducibility and replicability are terms that refer to the ability to obtain similar results and conclusions by either re$-$running the same data analysis as a past experiment or even repeating the entire experiment. While all these factors below may be useful, which of the following factors is most important in allowing someone to reproduce or replicate your data science project?

a$.$ Sharing your code on github.

b$.$ Thoroughly documenting all the steps of the project.

c$.$ Using standardized $R$ packages.

d$.$ Following best practices for naming of files.