What is the purpose of the function docstring?This type of question contains radio buttons and checkboxes for selection of options. Use Tab for navigation and Enter or space to select the option.optionATells the purpose of a functionoptionBDocuments aspects such as usage of code, code changes, install steps, deployment, and so onoptionCCaptures information at the module level about the functionality of the module and some detail about what each member of the module doesoptionDProvides documentation for a class directly