Final answer:
To generate a report showing page views per author, Custom Reports in an analytics platform is the best choice as it allows for specific dimensions and metrics to be defined and analyzed. So, option B is correct.
Step-by-step explanation:
To create a report showing the total number of page views for each author on your site, you would use Custom Reports in an analytics tool. Custom Reports allow you to define your dimensions and metrics that match your specific data needs. In this scenario, you would set 'Author' as a dimension and 'Page Views' as a metric. This will provide you with a report detailing the number of page views grouped by each author.
Other options listed, such as Annotations, Segments, Analytics Intelligence, and Dimension Widening, serve different purposes in data analysis. For instance, Segments lets you isolate and analyze specific subsets of your data, and Analytics Intelligence answers questions and provides insights using machine learning, but neither directly meets your need for author-based page view reporting as Custom Reports does.